| Variables | No Depression | Depression | x2, p value |
| Smoking status |
|
| 957.4, p = 0.000** |
| Every day | 5074 (20.5) | 4599 (32) |
|
| Some days | 1567 (6.3) | 1438 (10) |
|
| Former smoker | 11,510 (46.6) | 5191 (36.2) |
|
| Non-smoker | 6543 (26.5) | 3122 (21.8) |
|
| Days now smoking |
|
| 834.7, p = 0.000** |
| Every day | 5074 (28) | 4599 (41) |
|
| Some days | 1567 (8.6) | 1438 (12.8) |
|
| Not at all | 11,510 (63.4) | 5191 (46.2) |
|
| Smoked 100 cigarettes |
|
| 109.2, p = 0.000** |
| Yes | 18,193 (73.5) | 11,253 (78.3) |
|
| No | 6543 (26.5) | 3122 (21.7) |
|