Logistic regression analysis predicting intentions to quit smoking within 30 days of administration of baseline questionnaire
| Variable | Coefficient | Wald | Significance | Odds ratio (95% CI) |
| Confidence in ability to quit (a) | 0.900 | 142 | 0.000 | 2.46 (2.12 to 2.85) |
| Private insurance coverage (b) | 0.725 | 23 | 0.000 | 2.01 (1.53 to 2.77) |
| Cigarettes/day at baseline (c) | −0.041 | 22 | 0.000 | 0.96 (0.94 to 0.97) |
| Belief smoking can harm baby (a) | 0.440 | 22 | 0.000 | 1.53 (1.29 to 1.86) |
| Years of education (d) | 0.104 | 7 | 0.005 | 1.11 (1.03 to 1.19) |
| Number of friends who smoke (a) | 0.154 | 5 | 0.050 | 1.16 (1.00 to 1.36) |
(a) Odds associated with a one unit increase on an item with four categories.
(b) Odds associated with change in category from no insurance coverage to coverage.
(c) Odds associated with consumption of one additional cigarette/day.
(d) Odds associated with one additional year of education.
CI, confidence interval.