Trial Outcomes & Findings for CAP-Ketamine for Antidepressant Resistant PTSD (NCT NCT02655692)

NCT ID: NCT02655692

Last Updated: 2022-06-02

Results Overview

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

163 participants

Primary outcome timeframe

Session 1 -Day 0

Results posted on

2022-06-02

Participant Flow

Participant milestones

Participant milestones
Measure
Placebo
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Overall Study
STARTED
55
55
53
Overall Study
COMPLETED
36
41
40
Overall Study
NOT COMPLETED
19
14
13

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

CAP-Ketamine for Antidepressant Resistant PTSD

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo
n=54 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=53 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=51 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Total
n=158 Participants
Total of all reporting groups
Age, Continuous
42 years
STANDARD_DEVIATION 1.5 • n=99 Participants
45 years
STANDARD_DEVIATION 1.5 • n=107 Participants
43 years
STANDARD_DEVIATION 1.8 • n=206 Participants
43.3 years
STANDARD_DEVIATION 11.5 • n=7 Participants
Sex: Female, Male
Female
14 Participants
n=99 Participants
10 Participants
n=107 Participants
13 Participants
n=206 Participants
37 Participants
n=7 Participants
Sex: Female, Male
Male
40 Participants
n=99 Participants
43 Participants
n=107 Participants
38 Participants
n=206 Participants
121 Participants
n=7 Participants
Race/Ethnicity, Customized
White - non Hispanic
37 Participants
n=99 Participants
28 Participants
n=107 Participants
29 Participants
n=206 Participants
94 Participants
n=7 Participants
Race/Ethnicity, Customized
Black
6 Participants
n=99 Participants
7 Participants
n=107 Participants
7 Participants
n=206 Participants
20 Participants
n=7 Participants
Race/Ethnicity, Customized
Hispanic
8 Participants
n=99 Participants
11 Participants
n=107 Participants
12 Participants
n=206 Participants
31 Participants
n=7 Participants
Race/Ethnicity, Customized
Other
3 Participants
n=99 Participants
7 Participants
n=107 Participants
3 Participants
n=206 Participants
13 Participants
n=7 Participants
PCL
51.95 units on a scale
STANDARD_DEVIATION 10.82 • n=99 Participants
51.75 units on a scale
STANDARD_DEVIATION 12.38 • n=107 Participants
50.23 units on a scale
STANDARD_DEVIATION 14.69 • n=206 Participants
51.33 units on a scale
STANDARD_DEVIATION 12.62 • n=7 Participants

PRIMARY outcome

Timeframe: Session 1 -Day 0

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=54 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=53 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=51 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
PTSD Checklist (PCL)
48.56 units on a scale
Standard Deviation 12.76
46.62 units on a scale
Standard Deviation 17.71
47.88 units on a scale
Standard Deviation 14.46

PRIMARY outcome

Timeframe: Session 2 - Day 1

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=52 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=51 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=49 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
37.65 units on a scale
Standard Deviation 18.40
32.75 units on a scale
Standard Deviation 19.39
30.10 units on a scale
Standard Deviation 20.25

PRIMARY outcome

Timeframe: Session 3 - Day 3

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=51 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=50 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=44 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
36.90 units on a scale
Standard Deviation 18.11
33.66 units on a scale
Standard Deviation 18.67
34.20 units on a scale
Standard Deviation 18.37

PRIMARY outcome

Timeframe: Session 4 - Day 7

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=48 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=47 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=43 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
34.75 units on a scale
Standard Deviation 18.96
29.09 units on a scale
Standard Deviation 20.61
32.58 units on a scale
Standard Deviation 19.12

PRIMARY outcome

Timeframe: Session 5 - Day 10

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=47 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=45 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=46 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
35.11 units on a scale
Standard Deviation 18.84
28.51 units on a scale
Standard Deviation 21.12
31.46 units on a scale
Standard Deviation 18.60

PRIMARY outcome

Timeframe: Session 6 - Day 14

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=44 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=48 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=43 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
30.80 units on a scale
Standard Deviation 19.85
26.40 units on a scale
Standard Deviation 21.12
27.91 units on a scale
Standard Deviation 17.04

PRIMARY outcome

Timeframe: Session 7 - Day 17

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=44 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=47 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=41 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
28.48 units on a scale
Standard Deviation 19.47
24.13 units on a scale
Standard Deviation 20.15
26.54 units on a scale
Standard Deviation 17.58

PRIMARY outcome

Timeframe: Session 8 - Day 21

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=42 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=42 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=40 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
29.31 units on a scale
Standard Deviation 20.39
24.52 units on a scale
Standard Deviation 20.45
26.73 units on a scale
Standard Deviation 17.20

PRIMARY outcome

Timeframe: Session 9 - Day 24

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=45 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=46 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=42 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
28.31 units on a scale
Standard Deviation 19.89
21.94 units on a scale
Standard Deviation 20.35
25.62 units on a scale
Standard Deviation 19.86

PRIMARY outcome

Timeframe: Follow-up 1 - Day 25

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=44 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=43 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=41 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
27.34 units on a scale
Standard Deviation 20.25
21.35 units on a scale
Standard Deviation 20.70
22.54 units on a scale
Standard Deviation 17.98

PRIMARY outcome

Timeframe: Follow-up 2 - Day 28

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=25 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=17 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=12 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
37.84 units on a scale
Standard Deviation 18.37
34.59 units on a scale
Standard Deviation 18.45
39.58 units on a scale
Standard Deviation 15.55

PRIMARY outcome

Timeframe: Follow-up 3 - Day 29

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=24 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=18 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=11 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
33.79 units on a scale
Standard Deviation 19.80
33.72 units on a scale
Standard Deviation 20.17
40.27 units on a scale
Standard Deviation 16.29

PRIMARY outcome

Timeframe: Follow-up 4 - Day 35

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=38 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=38 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=33 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
26.92 units on a scale
Standard Deviation 19.17
22.84 units on a scale
Standard Deviation 21.46
24.09 units on a scale
Standard Deviation 17.05

PRIMARY outcome

Timeframe: Follow-up 5 - Day 42

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=35 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=39 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=37 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
28.14 units on a scale
Standard Deviation 20.92
25.62 units on a scale
Standard Deviation 21.81
29.16 units on a scale
Standard Deviation 19.85

PRIMARY outcome

Timeframe: Follow-up 6 - Day 49

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=35 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=39 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=38 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
30.71 units on a scale
Standard Deviation 21.33
24.90 units on a scale
Standard Deviation 20.66
30.21 units on a scale
Standard Deviation 18.82

PRIMARY outcome

Timeframe: Follow-up 7 - Day 56

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

The PTSD Checklist (PCL) is a brief measure of the symptoms of Posttraumatic Stress Disorder (PTSD) to measure change in PTSD symptoms. The PCL-5 is a 20-item self-report measure, a total symptom severity score (range - 0-80) is obtained by summing the scores for each of the 20 items. (5-point Likert (0 = "Not at all" to 4 = "Extremely"). A total symptom severity score (range 0-80) with higher scores indicating greater severity for PTSD

Outcome measures

Outcome measures
Measure
Placebo
n=39 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=41 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=35 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
The PTSD Checklist (PCL)
31.90 units on a scale
Standard Deviation 21.08
24.32 units on a scale
Standard Deviation 21.15
31.23 units on a scale
Standard Deviation 19.81

SECONDARY outcome

Timeframe: Session 1 - Day 0

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=54 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=52 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=51 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
28.24 score on a scale
Standard Deviation 8.43
27.81 score on a scale
Standard Deviation 10.30
27.84 score on a scale
Standard Deviation 9.30

SECONDARY outcome

Timeframe: Session 2 - Day 1

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=52 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=51 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=48 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
17.75 score on a scale
Standard Deviation 11.16
17.02 score on a scale
Standard Deviation 13.02
12.94 score on a scale
Standard Deviation 9.50

SECONDARY outcome

Timeframe: Session 3 - Day 3

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=51 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=50 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=44 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
19.98 score on a scale
Standard Deviation 11.22
19.34 score on a scale
Standard Deviation 12.77
17.86 score on a scale
Standard Deviation 11.55

SECONDARY outcome

Timeframe: Session 4 - Day 7

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=47 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=46 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=43 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
19.94 score on a scale
Standard Deviation 11.64
17.83 score on a scale
Standard Deviation 13.11
18.54 score on a scale
Standard Deviation 10.62

SECONDARY outcome

Timeframe: Session 5 - Day 10

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=47 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=45 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=46 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
20.70 score on a scale
Standard Deviation 11.79
16.64 score on a scale
Standard Deviation 12.90
18.07 score on a scale
Standard Deviation 9.98

SECONDARY outcome

Timeframe: Session 6 - Day 14

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=44 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=48 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=42 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
18.36 score on a scale
Standard Deviation 11.90
16.71 score on a scale
Standard Deviation 13.47
16.83 score on a scale
Standard Deviation 9.91

SECONDARY outcome

Timeframe: Session 7 - Day 17

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=44 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=47 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=41 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
17.02 score on a scale
Standard Deviation 12.52
14.75 score on a scale
Standard Deviation 12.98
15.15 score on a scale
Standard Deviation 10.35

SECONDARY outcome

Timeframe: Session 8 - Day 21

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=42 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=42 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=40 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
17.02 score on a scale
Standard Deviation 12.52
16.44 score on a scale
Standard Deviation 13.66
15.78 score on a scale
Standard Deviation 11.59

SECONDARY outcome

Timeframe: Session 9 - Day 24

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=45 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=45 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=42 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
17.11 score on a scale
Standard Deviation 11.75
14.43 score on a scale
Standard Deviation 12.29
14.24 score on a scale
Standard Deviation 10.59

SECONDARY outcome

Timeframe: Follow-up 1 - Day 25

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=44 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=42 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=41 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
15.98 score on a scale
Standard Deviation 12.32
12.91 score on a scale
Standard Deviation 12.60
10.78 score on a scale
Standard Deviation 9.85

SECONDARY outcome

Timeframe: Follow-up 2 - Day 28

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=25 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=18 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=12 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
24.00 score on a scale
Standard Deviation 10.30
25.11 score on a scale
Standard Deviation 12.20
25.08 score on a scale
Standard Deviation 7.34

SECONDARY outcome

Timeframe: Follow-up 3 - Day 29

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=24 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=17 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=11 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
15.00 score on a scale
Standard Deviation 11.55
19.18 score on a scale
Standard Deviation 13.99
20.27 score on a scale
Standard Deviation 8.32

SECONDARY outcome

Timeframe: Follow-up 4 - Day 35

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=37 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=37 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=33 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
16.08 score on a scale
Standard Deviation 11.15
14.43 score on a scale
Standard Deviation 12.71
12.72 score on a scale
Standard Deviation 9.24

SECONDARY outcome

Timeframe: Follow-up 5 - Day 42

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=35 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=39 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=36 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
16.89 score on a scale
Standard Deviation 12.51
15.74 score on a scale
Standard Deviation 13.03
16.42 score on a scale
Standard Deviation 9.39

SECONDARY outcome

Timeframe: Follow-up 6 - Day 49

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=35 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=38 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=37 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
19.60 score on a scale
Standard Deviation 11.52
15.87 score on a scale
Standard Deviation 11.79
17.68 score on a scale
Standard Deviation 8.86

SECONDARY outcome

Timeframe: Follow-up 7 - Day 56

Population: The variability in the number of participants for data points resulted from a variety of reasons for example participants not showing up for appointments, dropping out of the study and/or illness.

Montgomery-Asberg Depression Rating Scale (MADRS) is a clinician rated ten-item diagnostic questionnaire to measure the severity of depression. The overall score ranges from 0 to 60 (0 to 6 - normal/symptom absent; 7 to 19 mild depression; 20 to 34 - moderate depression; \>34 - severe depression)

Outcome measures

Outcome measures
Measure
Placebo
n=40 Participants
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=41 Participants
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=33 Participants
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Montgomery-Asberg Depression Rating Scale (MADRS)
19.45 score on a scale
Standard Deviation 11.19
15.44 score on a scale
Standard Deviation 12.98
19.58 score on a scale
Standard Deviation 10.94

Adverse Events

Placebo

Serious events: 0 serious events
Other events: 25 other events
Deaths: 0 deaths

Low Dose Ketamine

Serious events: 0 serious events
Other events: 42 other events
Deaths: 0 deaths

High Dose Ketamine

Serious events: 0 serious events
Other events: 38 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure
Placebo
n=55 participants at risk
Saline dose Placebo: This is a saline placebo/non-active solution.
Low Dose Ketamine
n=55 participants at risk
Low Dose Ketamine (.20 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
High Dose Ketamine
n=53 participants at risk
High Dose Ketamine (.50 mg/kg) Ketamine: FDA approved anesthetic medication with rapid acting antidepressant effects.
Social circumstances
agitation
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
5.5%
3/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
5.7%
3/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Psychiatric disorders
anxiety
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
3.6%
2/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
3.8%
2/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Gastrointestinal disorders
diarrhea
3.6%
2/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
5.5%
3/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
3.8%
2/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
General disorders
fatigue
3.6%
2/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
5.5%
3/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
7.5%
4/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
General disorders
headache
12.7%
7/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
25.5%
14/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
11.3%
6/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Social circumstances
irritability
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
9.1%
5/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
5.7%
3/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Gastrointestinal disorders
nausea/GI disturb
14.5%
8/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
14.5%
8/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
15.1%
8/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
General disorders
nightmares
3.6%
2/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.8%
1/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
3.8%
2/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
General disorders
soreness/bruising at INJ site
3.6%
2/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.9%
1/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Psychiatric disorders
depression
1.8%
1/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.8%
1/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.9%
1/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Psychiatric disorders
suicidality
1.8%
1/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.8%
1/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.9%
1/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
Gastrointestinal disorders
constipation
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
5.7%
3/53 • The study duration was 5 years; time Veterans participated was ~2 months total.
General disorders
sweating
0.00%
0/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
1.8%
1/55 • The study duration was 5 years; time Veterans participated was ~2 months total.
3.8%
2/53 • The study duration was 5 years; time Veterans participated was ~2 months total.

Additional Information

John Krystal

Yale University

Phone: 203.785.6396

Results disclosure agreements

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