Relapse Prevention Study Of Desvenlafaxine Succinate Sustained Release In Outpatients With Major Depressive Disorder

Time to relapse analyzed using log-rank test; defined as Hamilton Psychiatric Scale for Depression-17 item score ≥16 at any time during DB phase, discontinuation for unsatisfactory response or efficacy (need for additional or alternate treatment for depression, investigator decision to remove participant for efficacy reasons, or failure to return if investigator determined related to efficacy), hospitalization for depression, suicide attempt, or suicide. Participants who relapsed after DB day 185 or completed DB therapy without relapse were considered as censored on DB day 185 (study day 325).

CGI-I is a 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.

CGI-S is a 7-point clinician rated scale to assess severity of participant's current illness state; range of 1 (normal - not ill at all) to 7 (among the most extremely ill). Higher score = more affected. Change from baseline mean=adjusted mean change calculated using mixed-effects model for repeated measures (MMRM).

HAM-D17 is a standardized, clinician-administered rating scale that assesses 17 items characteristically associated with major depression (symptoms such as depressed mood, guilty feelings, suicide, sleep disturbances, anxiety levels, and weight loss). Nine items are scored on a 3 point scale (0=none/absent to 2=most severe) and 8 items are scored on a 5 point scale (0=none/absent to 4=most severe) for a maximum total score of 50; higher score indicates more depression. Change from baseline mean=adjusted mean change calculated using MMRM.

HAM-D6 is a standardized, clinician-administered rating scale is a subset of the HAM-D17 that assesses 6 items associated with major depression. The scale uses HAM-D17 items 1, 2, 7, 8, 10 and 13. Item 13 is scored 0 to 2 (0=none/absent to 2=most severe) and all others are scored 0 to 4 (0=none/absent to 4=most severe). Total score ranges from 0 to 22; higher score indicates more depression. Change from baseline mean=adjusted mean change calculated using MMRM.

HAM-D17 is a standardized, clinician-administered rating scale that assesses 17 items characteristically associated with major depression (symptoms such as depressed mood, guilty feelings, suicide, sleep disturbances, anxiety levels, and weight loss). Nine items are scored on a 3 point scale (0=none/absent to 2=most severe) and 8 items are scored on a 5 point scale (0=none/absent to 4=most severe) for a maximum total score of 50; higher score indicates more depression. Remission defined as HAM-D17 total score ≤7.

WHO-5 evaluates positive psychological well-being during the past 2 weeks and consists of 5 questions (felt cheerful, in good spirits; felt calm, relaxed; felt active, vigorous; woke up fresh, rested; and daily life filled with things that are interesting) each rated on a 6-point Likert scale from 0 (not present) to 5 (constantly present). Total raw score ranged from 0 (worst possible quality of life) to 25 (best possible quality of life). Change from baseline mean=adjusted mean change calculated using MMRM.

WPAI is a 6 question participant rated questionnaire to determine the degree to which depression affected work productivity while at work and affected activities outside of work. Four scores are derived: percentage of absenteeism, percentage of presenteeism (reduced productivity while at work), an overall work impairment score that combined absenteeism and presenteeism and percentage of impairment in activities performed outside of work. Scores scaled as 0 (not affected/no impairment) to 10 (completely affected/impaired). Higher score indicated greater impairment and less productivity.