Logistic regression analyses of predictors of completed illegal cigarette sales to minors with the analysis limited to smokers
| Variable | OR | 95% CI | p Value |
| Clerk ⩾ age 21 years | 1.0 | ||
| Clerk < age 21 years | 6.4 | 1.9 to 27.0 | < 0.01 |
| ID not requested | 1.0 | ||
| ID requested | 0.003 | 0 to 0.015 | < 0.001 |
| ID not shown | 1.0 | ||
| ID shown | 27 | 3.4 to 212 | < 0.01 |