Logistic regression analysis: variables associated with relapse (n = 270)
| Variable | Variable level | % Relapsed | OR (95% CI) | |
| Confidence to stay quit | Very confident | 32 | 1.00 | |
| None/a little/somewhat confident | 51 | 1.81 (1.05 to 3.12) | ||
| Family and friends' encouragement to stay quit | More encouragement | 25 | 1.00 | |
| Less encouragement | 51 | 2.90 (1.70 to 4.94) | ||
| Number of friends/ family who smoke | None | 17 | 1.00 | |
| A few | 38 | 3.49 (1.25 to 9.78) | ||
| Most/all | 49 | 5.33 (1.85 to 15.40) | ||
OR, odds ratio; CI, confidence interval