Association between secondhand smoke exposure and depression in those who have never smoked and current smokers
| Variables | N | OR | (95% CI) | OR* | (95% CI) | OR† | (95% CI) |
|---|---|---|---|---|---|---|---|
| Never smoked (n=66 655) | |||||||
| Secondhand smoke exposure | |||||||
| No exposure | 40 815 | 1 | (reference) | 1 | (reference) | 1 | (reference) |
| 1–4 days per week | 17 778 | 1.26 | (1.21 to 1.31) | 1.23 | (1.18 to 1.29) | 1.20 | (1.15 to 1.25) |
| 5 or more days per week | 8062 | 1.71 | (1.63 to 1.81) | 1.57 | (1.49 to 1.66) | 1.38 | (1.30 to 1.46) |
| Current smoker (n=8988) | |||||||
| Secondhand smoke exposure | |||||||
| No exposure | 4101 | 1 | (reference) | 1 | (reference) | 1 | (reference) |
| 1–4 days/week | 2557 | 1.33 | (1.19 to 1.48) | 1.26 | (1.13 to 1.41) | 1.26 | (1.12 to 1.42) |
| 5 or more days per week | 2330 | 1.62 | (1.44 to 1.82) | 1.44 | (1.28 to 1.62) | 1.33 | (1.17 to 1.50) |
*Adjusted for age, sex and alcohol consumption.
†Additionally adjusted for age, sex and alcohol consumption, socioeconomic status, stress and family live together.