Table 2.
Patient population and attrition rates in included studies.
| Study | Mean Age in years (Standard Deviation, if available) and Sex F, Females; M, Males | Socio-economic status | Co-morbid medical conditions | Participant numbers Number of participants at baseline (B) and follow-up(FU); attrition in percentage |
|---|---|---|---|---|
| Alvarez et al., 1999 | 45 (13.8) | Not described | Not described | 10 B |
| 6F, 2M | 8 FU 20% attrition | |||
| Arolt et al., 2003 | 46.4 (9.8) | Not described | Patients with co-morbid conditions excluded from study | 25 B |
| Not described | 25 FU No attrition | |||
| Baldwin et al., 2006 | 73.9 | Not described | Not described | 50 B |
| Not described | 28 FU 44% attrition | |||
| Baune et al., 2012 | Not described | Not described | Presence/absence of a list of medical conditions noted and entered into statistical analysis | 73 B |
| Sample size at follow-up not specified | ||||
| Duval et al., 1996 | 39.8 (12.9); | Not described | Patients with co-morbid conditions excluded from study | 30 B |
| 19M, 11F | 30 FU No attrition | |||
| Jang et al., 2008 | 60.3; | Not described | Patients with co-morbid conditions excluded from study | 59 B |
| 43F, 16M | 59 FU No attrition | |||
| Johnston et al., 1999 | 47; | Not described | Patients with co-morbid conditions excluded from study | 47 B |
| 24F, 10M | 34 FU 27.6% attrition | |||
| Jokinen and Nordstrom, 2009 | 52 (16.4); | Not described | Patients with co-morbid conditions excluded from study | 382 B |
| 256F, 126M | 346 FU 9.4% attrition | |||
| Kin et al., 1997 | Not described | Not described | Not described | 95 B |
| 70 FU 26.3% attrition | ||||
| Ladwig et al., 2005 | 57.75 (7.8); | Education status described and entered into statistical analysis | Patients with co-morbid conditions excluded from study | 986 B |
| 975M | 975 FU 1.1% attrition | |||
| Lanquillon et al., 2000 | 53.5; | Not described | Patients with co-morbid conditions excluded from study | 35 B |
| 15F, 9M | 24 FU 30.5% attrition | |||
| Perez et al., 1998 | M 45 (2.9), F 44.9 (2.0); | Not described | Patients with co-morbid conditions excluded from study | 89 B |
| 59F, 24M | 83 FU 6.7% attrition | |||
| Raison et al., 2013 | 42.5(8.2) placebo group, 44.3 (9.4) intervention group; | Education and employment status described but not entered into statistical analysis | Notable exclusions- previous history of cancer, history of unstable cardiovascular, endocrinologic, hematologic, hepatic, renal, or neurologic disease (determined by Physical examination and laboratory testing). Number of co-morbid medical conditions noted and entered into statistical analysis | 60 B |
| 40F, 20M | 60 FU No attrition | |||
| Ribeiro et al., 1993 | Not described | Not described | Not described | Not described |