Table 2. Sample characteristics (n=368).
| Sociodemographics |
Details |
Statistics | ||
|---|---|---|---|---|
| Case | Control | Total | P-value | |
| Male (%) | 25 (16) | 46 (21) | ||
| Female (%) | 127 (84) | 170 (79) | ||
| Mean age in years (s.d.) | 47.1 (9.4) | 46.3 (10.2) | 46.7 (9.8) | 0.55a |
| Lifestyle indicators | ||||
| Physical activity (70) | 0.022b | |||
| >4 h per week (%) | 52 (41.3) | 94 (54.6) | 146 (49.0) | |
| ⩽4 h per week (%) | 74 (58.7) | 78 (45.4) | 152 (51.0) | |
| Smoking (1) | 0.011b | |||
| Smoking (%) | 41 (27) | 32 (14.9) | 73 (19.9) | |
| Previous smoker (%) | 53 (34.9) | 77 (35.8) | 130 (35.4) | |
| Never smoker (%) | 58 (38.1) | 106 (49.3) | 164 (44.7) | |
| BMI (2) kg/m2 (s.d.) | 26.0 (5.4) | 25.3 (4.3) | 25.6 (4.8) | 0.40a |
| Alcohol (3) | 0.131b | |||
| ⩽20/30 g per day (%) | 138 (90.8) | 202 (94.8) | 340 (93.2) | |
| >20/30 g per day (%) | 14 (9.2) | 11 (5.2) | 25 (6.8) | |
| Health indicators | ||||
| Depression | ||||
| Mild depression (%) | 56 (36.8) | |||
| Moderate depression (%) | 70 (46.1) | |||
| Severe depression (%) | 26 (17.1) | |||
| Previous depressive episodes (11) | <0.001b | |||
| Previous depressive episodes (%) | 79 (54.9) | 26 (12.2) | 105 (29.4) | |
| No previous depressive episodes (%) | 65 (45.1) | 187 (87.8) | 252 (70.6) | |
| Previous diagnosis with other mental disorders (26) | <0.001b | |||
| Previous diagnosis with other mental disorders (%) | 14 (10.7) | 1 (0.5) | 15 (4.4) | |
| No previous diagnosis with other mental disorders (%) | 117 (89.3) | 210 (99.5) | 327 (95.6) | |
| Antidepressant treatment (66) | <0.001b | |||
| No antidepressant treatment (%) | 102 (70.3) | 152 (96.8) | 254 (84.1) | |
| Antidepressant treatment (%) | 43 (29.7) | 5 (3.2) | 48 (15.9) | |
| SLEs | <0.001b | |||
| No experienced SLEs | 63 (41.5) | 135 (62.5) | 198 (53.8) | |
| One experienced SLE | 42 (27.6) | 58 (26.9) | 100 (27.2) | |
| Two or more experienced SLEs | 47 (30.9) | 23 (10.6) | 70 (19.0) | |
Abbreviations: BMI, body mass index; SLE, stressful life event.
a
Wilcoxon two-sample rank-sum test (Mann–Whitney test).
b
Chi square test.
Number of missing individuals are listed in bold parenthesis in the first column.