| Variable | OR (95% CI)† |
|---|---|
| Age, yr | |
| ≤ 24 | 1.00 |
| 25-44 | 1.53 (1.10-2.14) |
| 45-64 | 2.24 (1.79-2.80) |
| ≥ 65 | 1.70 (1.39-2.09) |
| Sex | |
| Male | 1.00 |
| Female | 1.66 (1.47-1.88) |
| COPD | |
| No | 1.00 |
| Yes | 2.16 (1.73-2.67) |
| No. of years smoking | |
| < 5 | 1.00 |
| 5-15 | 1.68 (1.24-2.27) |
| >15 | 1.15 (0.97-1.37) |
| Time (min) to first cigarette in the morning‡ | |
| > 60 | 1.00 |
| 31-60 | 1.21 (0.99-1.47) |
| 6-30 | 1.37 (1.15-1.62) |
| ≤ 5 | 2.00 (1.66-2.40) |
| Cessation self-efficacy§ | |
| < 7 | 1.00 |
| ≥ 7 | 0.78 (0.69-0.90) |
Note: CI = confidence interval, COPD = chronic obstructive pulmonary disease, OR = odds ratio.
*Model adjusted for clinic-level clustering effects.
†1 = self-reported anxiety or depression (n = 2379); 0 = did not self-report anxiety or depression (n = 2787).
‡"How soon after you wake up do you smoke your first cigarette?"
§"On a scale of 0 to 10 how confident are you that you would be able to quit smoking at this time? (0 = not at all confident, 10 = extremely confident)."