Trial Outcomes & Findings for An Investigation of the EndoStim® Lower Esophageal Sphincter (LES) Stimulation System for the Treatment of Reflux (NCT NCT02749071)

Patients must be implanted with the device to be randomized.

An Investigation of the EndoStim® Lower Esophageal Sphincter (LES) Stimulation System for the Treatment of Reflux

Rate of occurrence of device and/or procedure-related serious adverse events after 12 months of implant

Comparison between treatment and control group: percentage of subjects achieving pH success ((pH\<4 for more than 5.3% of time or at least 50% improvement in pH compared to baseline)

The secondary efficacy endpoint was the number of subjects achieving GERD symptom success defined as an improvement in the composite GERD Health-related Quality of Life (GERD-HRQL) patient reported outcome questionnaire score of 50% or more after 12 months on stimulation compared to the baseline off-PPI or H2 blocker composite GERD-HRQL score. Questions regarding heartburn severity and difficulty swallowing are asked on scale of 0 to 5: 0 = No symptoms; 1 = Symptoms noticeable but not bothersome; 2 = Symptoms noticeable and bothersome but not every day; 3 = Symptoms bothersome every day; 4 = Symptoms affect daily activities; and 5 = Symptoms are incapacitating - unable to do activities. The composite score is calculated by adding the responses to the individual questions. The minimum score possible is 0 and the maximum score is 45.

Composite GERD Health-related Quality of Life (GERD-HRQL) patient reported outcome questionnaire scores. Questions regarding are asked on scale of 0 to 5: 0 = No symptoms; 1 = Symptoms noticeable but not bothersome; 2 = Symptoms noticeable and bothersome but not every day; 3 = Symptoms bothersome every day; 4 = Symptoms affect daily activities; and 5 = Symptoms are incapacitating - unable to do activities. The composite score is calculated by adding the responses to the individual questions. The minimum score possible is 0 and the maximum score is 45. Previous versions of the protocol and case report forms did not include the question about bloating; thus, this question was not included in the calculation of the composite score. The lower scores are associated with less impactful symptoms.

Patients with a minimum of 18 hours of Bravo Esophageal pH monitoring had the percent time calculated for time where the distal supine esophageal pH \< 4.0 over the total number of hours recorded. Data are reported as change from baseline.

Heartburn symptoms were recorded by the patient in a diary. Severity was scored on a scale of 0 to 3 (0 = no symptoms, 1 = mild, 2 = moderate, 3 = severe). Low scores represent a better outcome. Median daily severity of worst episode during the on-PPI/H2 blocker period reported as change from baseline.

Regurgitation symptoms were recorded by the patient in a diary. Severity was scored on a scale of 0 to 3 (0 = no symptoms, 1 = mild, 2 = moderate, 3 = severe). Low scores represent a better outcome. Median daily severity of worst episode reported as change from baseline.

Number of subjects reporting more than 50% of days with no PPI medication use in the patient diary during the "on-PPI" period.

Heartburn symptoms were recorded by the patient in a diary. Severity was scored on a scale of 0 to 3 (0 = no symptoms, 1 = mild, 2 = moderate, 3 = severe). Percent of reported time with any heartburn symptoms at night during the on-PPI period.

Regurgitation symptoms were recorded by the patient in a diary. Severity was scored on a scale of 0 to 3 (0 = no symptoms, 1 = mild, 2 = moderate, 3 = severe). Percent of reported time with any regurgitation symptoms at night during the on-PPI period. Data are reported as change from baseline.

The Short Form Health Survey (SF-12) is used to assess quality of life. Scores are generated from the Quality Metric proprietary algorithm. The mean score in the US general population is set to 50 with standard deviation of 10. The higher scores indicate a higher quality of life. Number of patients with any improvement

The Short Form Health Survey (SF-12) was used to assess quality of life. Scores are generated from the Quality Metric proprietary algorithm. The mean score in the US general population is set to 50 with standard deviation of 10. The higher scores indicate a higher quality of life. Number of patients with any improvement

Number of subjects reporting zero days of PPI medication use in the patient diary during the "on-PPI" period.

As recorded in the patient diary (includes both day and night) for the on-PPI period. Data are reported as change from baseline of the percent of reported time with any regurgitation symptoms.

Fraction of time (percent of total) with distal esophageal pH \< 4.0 using Bravo Esophageal pH Monitoring from baseline to the Month 6 Visit for patients who were off PPI medication for a minimum of five days before the test. Data are reported as change from baseline.

Percent of time reported in the patient diary with any PPI medication use for symptoms. Data are reported as change from baseline.

Heartburn symptom frequency (day and night) as measured by Subject Diary during the on-PPI period. Data are reported as change from baseline of the percent of reported time with any heartburn symptoms.

The Short Form Health Survey (SF-12) was used to assess quality of life, both in terms of physical health and mental health. Scores are generated from the Quality Metric's proprietary algorithm. The mean score in the US general population is set to 50 with standard deviation of 10. The higher scores indicate a higher quality of life. Data are reported as change from baseline.

The Short Form Health Survey (SF-12) was used to assess quality of life, both in terms of physical health and mental health. Scores are generated from the Quality Metric's proprietary algorithm. The mean score in the US general population is set to 50 with standard deviation of 10. Higher scores indicate a higher quality of life. Data are reported as change from baseline.