Trial Outcomes & Findings for UW Quitting Using Intensive Treatment Study (QUITS) (NCT NCT03176784)

NCT ID: NCT03176784

Last Updated: 2023-01-23

Results Overview

Biochemically-confirmed self-reported total abstinence from any cigarette use (even a single puff) for the seven days preceding the target follow-up day, confirmed with an exhaled carbon monoxide reading of less than or equal to 5 ppm.

Recruitment status

COMPLETED

Study phase

PHASE4

Target enrollment

1251 participants

Primary outcome timeframe

Assessed 52 weeks after quit date

Results posted on

2023-01-23

Participant Flow

Recruitment occurred via community outreach (e.g., social networking sites, radio, TV, newspaper). Interested respondents were called and screened for initial eligibility; those eligible attended a group orientation session that entailed: final eligibility assessment, written informed consent, baseline assessments, biochemical confirmation of smoking status, and randomization. Study visits were in Madison and Milwaukee, WI. First participant enrolled on 11/11/17; study completed on 7/9/20.

Participant milestones

Participant milestones
Measure
Varenicline + Patch Standard Duration
Standard Condition Varenicline: 0.5 mg pill once daily (QD) on Days -7 to -5; 0.5 mg pill twice daily (BID) Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
Overall Study
STARTED
314
315
311
311
Overall Study
COMPLETED
209
202
198
241
Overall Study
NOT COMPLETED
105
113
113
70

Reasons for withdrawal

Reasons for withdrawal
Measure
Varenicline + Patch Standard Duration
Standard Condition Varenicline: 0.5 mg pill once daily (QD) on Days -7 to -5; 0.5 mg pill twice daily (BID) Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
Overall Study
Lost to Follow-up
77
79
79
49
Overall Study
Withdrawal by Subject
28
34
34
21

Baseline Characteristics

UW Quitting Using Intensive Treatment Study (QUITS)

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Varenicline + Patch Standard Duration
n=314 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=315 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
Total
n=1251 Participants
Total of all reporting groups
Age, Continuous
48.9 years
STANDARD_DEVIATION 12.4 • n=99 Participants
48.6 years
STANDARD_DEVIATION 11.4 • n=107 Participants
48.9 years
STANDARD_DEVIATION 12.3 • n=206 Participants
49.9 years
STANDARD_DEVIATION 11.5 • n=157 Participants
49.1 years
STANDARD_DEVIATION 11.9 • n=390 Participants
Sex: Female, Male
Female
171 Participants
n=99 Participants
171 Participants
n=107 Participants
166 Participants
n=206 Participants
167 Participants
n=157 Participants
675 Participants
n=390 Participants
Sex: Female, Male
Male
143 Participants
n=99 Participants
144 Participants
n=107 Participants
145 Participants
n=206 Participants
144 Participants
n=157 Participants
576 Participants
n=390 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
14 Participants
n=99 Participants
10 Participants
n=107 Participants
12 Participants
n=206 Participants
5 Participants
n=157 Participants
41 Participants
n=390 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
285 Participants
n=99 Participants
297 Participants
n=107 Participants
285 Participants
n=206 Participants
297 Participants
n=157 Participants
1164 Participants
n=390 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
15 Participants
n=99 Participants
8 Participants
n=107 Participants
14 Participants
n=206 Participants
9 Participants
n=157 Participants
46 Participants
n=390 Participants
Race (NIH/OMB)
American Indian or Alaska Native
3 Participants
n=99 Participants
5 Participants
n=107 Participants
4 Participants
n=206 Participants
2 Participants
n=157 Participants
14 Participants
n=390 Participants
Race (NIH/OMB)
Asian
2 Participants
n=99 Participants
2 Participants
n=107 Participants
3 Participants
n=206 Participants
1 Participants
n=157 Participants
8 Participants
n=390 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=99 Participants
1 Participants
n=107 Participants
0 Participants
n=206 Participants
2 Participants
n=157 Participants
3 Participants
n=390 Participants
Race (NIH/OMB)
Black or African American
71 Participants
n=99 Participants
70 Participants
n=107 Participants
68 Participants
n=206 Participants
78 Participants
n=157 Participants
287 Participants
n=390 Participants
Race (NIH/OMB)
White
221 Participants
n=99 Participants
219 Participants
n=107 Participants
213 Participants
n=206 Participants
214 Participants
n=157 Participants
867 Participants
n=390 Participants
Race (NIH/OMB)
More than one race
5 Participants
n=99 Participants
6 Participants
n=107 Participants
9 Participants
n=206 Participants
7 Participants
n=157 Participants
27 Participants
n=390 Participants
Race (NIH/OMB)
Unknown or Not Reported
12 Participants
n=99 Participants
12 Participants
n=107 Participants
14 Participants
n=206 Participants
7 Participants
n=157 Participants
45 Participants
n=390 Participants
Region of Enrollment
United States
314 participants
n=99 Participants
315 participants
n=107 Participants
311 participants
n=206 Participants
311 participants
n=157 Participants
1251 participants
n=390 Participants

PRIMARY outcome

Timeframe: Assessed 52 weeks after quit date

Biochemically-confirmed self-reported total abstinence from any cigarette use (even a single puff) for the seven days preceding the target follow-up day, confirmed with an exhaled carbon monoxide reading of less than or equal to 5 ppm.

Outcome measures

Outcome measures
Measure
Varenicline + Patch Standard Duration
n=314 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=315 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
52-Week Point-Prevalence Abstinence
74 Participants
79 Participants
78 Participants
76 Participants

SECONDARY outcome

Timeframe: Assessed 23 weeks after quit date

Biochemically confirmed self-reported total abstinence from any cigarette use (even a single puff) for the seven days preceding the target follow-up day, confirmed with an exhaled carbon monoxide reading of less than or equal to 5 ppm.

Outcome measures

Outcome measures
Measure
Varenicline + Patch Standard Duration
n=314 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=315 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
23-Week Point-Prevalence Abstinence
74 Participants
66 Participants
82 Participants
70 Participants

SECONDARY outcome

Timeframe: Assessed 52 weeks after quit date

Biochemically confirmed self-reported total abstinence from any cigarette use (even a single puff) from week 2 post-quit through week 52 post-quit, confirmed with an exhaled carbon monoxide reading of less than or equal to 5 ppm.

Outcome measures

Outcome measures
Measure
Varenicline + Patch Standard Duration
n=314 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=315 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
52-Week Prolonged Abstinence
47 Participants
55 Participants
57 Participants
46 Participants

SECONDARY outcome

Timeframe: Assessed 23 weeks after quit date

Biochemically confirmed self-reported total abstinence from any cigarette use (even a single puff) from week 2 post-quit through week 23 post-quit, confirmed with an exhaled carbon monoxide reading of less than or equal to 5 ppm.

Outcome measures

Outcome measures
Measure
Varenicline + Patch Standard Duration
n=314 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=315 Participants
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=311 Participants
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
23-Week Prolonged Abstinence
66 Participants
72 Participants
73 Participants
65 Participants

Adverse Events

Varenicline + Patch Standard Duration

Serious events: 0 serious events
Other events: 194 other events
Deaths: 0 deaths

Varenicline Only Standard Duration

Serious events: 1 serious events
Other events: 164 other events
Deaths: 0 deaths

Varenicline + Patch Extended Duration

Serious events: 0 serious events
Other events: 159 other events
Deaths: 0 deaths

Varenicline Only Extended Duration

Serious events: 1 serious events
Other events: 160 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Varenicline + Patch Standard Duration
n=305 participants at risk;n=314 participants at risk
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=300 participants at risk;n=315 participants at risk
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=295 participants at risk;n=311 participants at risk
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=307 participants at risk;n=311 participants at risk
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
General disorders
Anaphylaxis
0.00%
0/314 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
0.32%
1/315 • Number of events 1 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
0.00%
0/311 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
0.00%
0/311 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
General disorders
Allergic Reaction
0.00%
0/314 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
0.00%
0/315 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
0.00%
0/311 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
0.32%
1/311 • Number of events 1 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.

Other adverse events

Other adverse events
Measure
Varenicline + Patch Standard Duration
n=305 participants at risk;n=314 participants at risk
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Nicotine Patches: Patches (Nicotine): 14 mg Patches for 2 weeks prequit and then 10 weeks post-quit, then 7 mg patches for Weeks 11 and 12; Placebo patches weeks 13-24 Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations. Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline Only Standard Duration
n=300 participants at risk;n=315 participants at risk
Standard Condition Varenicline: 0.5 mg pill QD on Days -7 to -5; 0.5 mg pill BID Days -4 to -1; 1 mg pill BID Days 1 to Week 11; Placebo Pill weeks 12-23 BID Standard Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations. Placebo Pill: Placebo pills matched in appearance to the Active Varenicline pills in the Varenicline intervention. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.)
Varenicline + Patch Extended Duration
n=295 participants at risk;n=311 participants at risk
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Nicotine Patches: 14 mg Patches for 2 weeks prequit and then weeks 1-22 post-quit, then 7 mg patches for Weeks 23 and 24 post-quit. Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Nicotine patch: 14 mg and 7 mg nicotine patches used. See arms for specific durations.
Varenicline Only Extended Duration
n=307 participants at risk;n=311 participants at risk
Extended Condition Varenicline: 0.5 mg pill QD on Days -7 to -5, 0.5 mg pill BID Days -4 to -1, and 1 mg pill BID Days 1 to Week 22 Extended Condition Placebo Patches: Placebo patches for 2 weeks prequit and for weeks 1-24 post-quit Varenicline: 0.5mg and 1.0 mg pills used. See arms for specific durations. (Active and placebo varenicline pills provided at no cost through an independent research agreement with Pfizer.) Placebo Patch: Placebo patches matched in appearance to the Active 14 mg and 7 mg nicotine patches used in the Nicotine patch intervention. See arms for specific durations.
Gastrointestinal disorders
Nausea
30.2%
92/305 • Number of events 92 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
24.0%
72/300 • Number of events 72 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
24.7%
73/295 • Number of events 73 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
30.9%
95/307 • Number of events 95 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
Nervous system disorders
Headache
3.9%
12/305 • Number of events 12 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
6.7%
20/300 • Number of events 20 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
5.4%
16/295 • Number of events 16 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
5.5%
17/307 • Number of events 17 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
Skin and subcutaneous tissue disorders
Itching/Hives
13.1%
40/305 • Number of events 40 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
3.0%
9/300 • Number of events 9 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
13.2%
39/295 • Number of events 39 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
4.6%
14/307 • Number of events 14 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
Skin and subcutaneous tissue disorders
Skin Rash
17.4%
53/305 • Number of events 53 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
11.3%
34/300 • Number of events 34 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
17.3%
51/295 • Number of events 51 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
9.8%
30/307 • Number of events 30 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
Psychiatric disorders
Insomnia
30.5%
93/305 • Number of events 93 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
29.3%
88/300 • Number of events 88 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
24.4%
72/295 • Number of events 72 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
27.0%
83/307 • Number of events 83 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
Psychiatric disorders
Changes in Mood
16.4%
50/305 • Number of events 50 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
16.0%
48/300 • Number of events 48 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
18.0%
53/295 • Number of events 53 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.
16.3%
50/307 • Number of events 50 • Adverse event data were collected and tabulated for the first 12 weeks of treatment.
Some participants did not complete the adverse event assessments. The denominators used to calculate the percentage of participants reporting a given adverse event in each of the four conditions equal the number of participants responding to the adverse event assessment inquiry. Thus, the denominators do not equal the number of participants who started the study in each of the four conditions.

Additional Information

Stevens S. Smith, Ph.D.

University of Wisconsin School of Medicine and Public Health

Phone: 608-262-7563

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place