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Logistic regression analysis of the 1-year smoking abstinence rate (per-protocol analysis).
| Variable | OR | 95% CI | P value |
| Intercept | 0.00 | 0.00-0.02 | — |
| Intervention group | 3.45 | 1.39-9.13 | .01 |
| Age | 1.09 | 1.03-1.17 | .01 |
| Motivation to stop smoking (Richmond score) | 1.90 | 1.07-3.52 | .03 |
| Charlson index, medium comorbidity | 0.76 | 0.16-3.60 | .72 |
| Charlson index, high comorbidity | 0.07 | 0.01-0.45 | .01 |
