Table 3.
Association between secondhand smoking and depression with different exposure duration
| Characteristics | Male | Female | ||
|---|---|---|---|---|
| Case N (weighted %) | ORa (95 % CI) | Case N (weighted %) | ORa (95 % CI) | |
| Workplace exposure (N = men 14,766, women 19,804) | ||||
| No exposure | 859 (54.8) | 1.00 (ref) | 2,879 (77.2) | 1.00 (ref) |
| <1 hour/day | 389 (29.4) | 0.92 (0.77–1.09) | 470 (14.0) | 0.89 (0.76–1.04) |
| ≥1 hour/day | 208 (15.8) | 1.23 (0.97–1.54) | 246 (8.8) | 1.32 (1.06–1.64) |
| p-trend | 0.256 | p-trend | 0.159 | |
| Home exposure (N = men 14,846, women 20,194) | ||||
| No exposure | 1,359 (91.5) | 1.00 (ref) | 2,896 (75.4) | 1.00 (ref) |
| <1 hour/day | 81 (6.6) | 0.90 (0.65–1.23) | 2,083 (17.1) | 1.18 (1.02–1.35) |
| ≥1 hour/day | 24 (2.0) | 1.21 (0.69–2.13) | 215 (7.5) | 1.71 (1.34–2.18) |
| p-trend | 0.977 | p-trend | <0.001 | |
aAdjusted for age, marital status, education, employment status, self-reported stress, self-rated health, alcohol dependence (AUDIT) and past diagnosis of depression by physicians