Table 1.
Characteristics of study participants (n = 179)
| Variable | Case (n = 51) | Control 1 (n = 57) | Control 2 (n = 71) | P (ANOVA for mean difference, χ2 for categorical variables) |
|---|---|---|---|---|
| Age in years; mean (SD) | 43.2 (13.3) | 45.3 (14.0) | 46.7 (18.7) | 0.529 |
| Female; n (%) | 24 (47.1) | 29 (50.9) | 34 (47.9) | 0.913 |
| BMI (kg/m2); mean (SD) | 28.3 (8.5) | 28.7 (5.7) | 28.3 (6.5) | 0.097 |
| Never married; n (%) | 19 (37.3) | 23 (40.4) | 22 (31.0) | 0.028 |
| Completed college/university; n (%) | 20 (37.3) | 21 (36.8) | 41 (57.7) | 0.017 |
| Currently employed; n (%) | 12 (23.5) | 19 (33.9) | 39 (54.9) | 0.001 |
| Annual income <30 k/year; n (%) | 20 (39.2) | 21 (36.8) | 12 (16.9) | 0.051 |
| Currently smoking; n (%) | 25 (49.0) | 18 (31.6) | 10 (14.1) | <0.001 |
| Family history of suicidal behavior; n (%) | 20 (39.2) | 16 (28.1) | 17 (23.9) | 0.081 |
BMI body mass index, ANOVA analysis of variance