Table 2.
Daily Smoking by Use of NRT During 2 Follow-Back Periods (Person Days = 48,784)
| Used NRT (Days 1 to 90) | ||
|---|---|---|
| Smoking Abstinent | Yes | No |
| Yes | 8,221 (68.6%) | 2,662 (17.5%) |
| No | 3,758 (31.4%) | 12,547 (82.4%) |
| Column total | 11,979 (100.0%) | 15,209 (100.0%) |
| OR* = 7.05 (95% CI 5.42 to 9.14) | ||
| z = −14.62, P < 0.001 | ||
| Used NRT (days 91 to 180) | ||
|---|---|---|
| Yes | No | |
| Yes | 823 (64.1%) | 4,348 (21.4%) |
| No | 460 (35.9%) | 15,965 (78.6%) |
| Column total | 1,283 (100.0%) | 20,313 (100.0%) |
| OR* = 7.16 (95% CI 3.86 to 13.25) | ||
| z = −6.26, P < 0.001 | ||
*
Generalized estimating equation estimates, confidence interval estimates, and significance tests were based on robust standard error estimators
NRT, nicotine replacement therapy; CI, confidence ratio; OR, odds ratio.