NRT defined as reported use for more than 6 weeks | NRT defined as any reported use | |||||
OR (95% CI) | OR (95% CI) | |||||
Cohort of recent quitters—time since quit | ≤2 Years | ≤1 Year | ≤6 Months | ≤2 Years | ≤1 Year | ≤6 Months |
Predictor variable: Referent | ||||||
Prior heavy dependent smokers | ||||||
Use of NRT only: no use of NRT or professional help | 1.28 (0.52 to 3.16) | 1.37 (0.46 to 4.04) | 2.49 (0.73 to 8.51) | 2.68 (1.40 to 5.11) | 2.62 (1.22 to 5.62) | 3.53 (1.50 to 8.32) |
Use of NRT and professional help: no NRT or professional help | 0.62 (0.21 to 1.84) | 0.51 (0.15 to 1.77) | 0.57 (0.13 to 2.46) | 0.94 (0.40 to 2.22) | 0.98 (0.37 to 2.56) | 2.03 (0.62 to 6.58) |
Prior light dependent smokers | ||||||
Use of NRT only: no use of NRT or professional help | 3.29 (0.57 to 18.9) | 8.31 (1.45 to 47.5) | 3.49 (0.28 to 43.2) | 1.38 (0.34 to 5.67) | 1.57 (0.29 to 8.53) | 0.39 (0.06 to 2.43) |
Use of NRT and professional help: no use of NRT or professional help | 2.61 (0.58 to 11.7) | 4.51 (0.80 to 25.4) | 4.89 (0.39 to 61.0) | 2.08 (0.73 to 5.85) | 1.87 (0.57 to 6.14) | 3.95 (0.94 to 16.5) |
Prior smoking abstinence* | 0.42 (0.27 to 0.65) | 0.40 (0.24 to 0.68) | 0.39 (0.19 to 0.81) | 0.46 (0.29 to 0.73) | 0.49 (0.28 to 0.86) | 0.44 (0.21 to 0.90) |
Over 44 years of age: 18–44 years of age | 0.68 (0.40 to 1.16) | 0.53 (0.30 to 0.92) | 0.41 (0.22 to 0.80) | 0.68 (0.40 to 1.16) | 0.57 (0.33 to 0.97) | 0.41 (0.22 to 0.80) |
↵* Results of generalised linear latent and mixed models logistic regression models: The variable prior smoking abstinence is ≥6 months versus <6 months for analyses based on the cohorts of recent quitters within the past 2 years and past 1 year; and ≥3 months versus <3 months for analyses based on the cohorts of recent quitters within the past 6 months. Variables, education, race and gender were not statistically significant at p<0.05 or confounders in either model.
NRT, nicotine replacement therapy.