Table 2.
Fully Adjusted Models Predicting Smoking Cessation and Treatment Adherence at Week 52
| Variable (unit or referent) | Abstinence | Patch adherence | Counseling adherence | |||
|---|---|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p value | OR (95% CI) | p value | |
| Sex (female) | 0.89 (0.51% to 1.54%) | .666 | 1.27 (0.85% to 1.90%) | .252 | 0.97 (0.65% to 1.45%) | .874 |
| Race (racial minority) | 0.86 (0.48% to 1.55%) | .616 | 0.75 (0.49% to 1.14%) | .176 | 0.57 (0.37% to 0.87%) | .009 |
| Age (years) | 1.00 (0.98% to 1.03%) | .909 | 1.02 (1.00% to 1.04%) | .017 | 1.04 (1.02% to 1.06%) | <.001 |
| Education (≤HS graduate) | 2.08 (1.09% to 3.95%) | .026 | 1.05 (0.67% to 1.66%) | .825 | 1.55 (0.98 to 2.47%) | .063 |
| Income (≤$50 000/y) | 1.82 (0.97% to 3.41%) | .062 | 0.81 (0.51% to 1.29%) | .366 | 0.98 (0.61% to 1.55%) | .914 |
| Sexual orientation (heterosexual) | 2.43 (1.03% to 5.75%) | .044 | 1.97 (1.00% to 3.90%) | .050 | 1.57 (0.78% to 3.17%) | .210 |
| Tobacco dependence (HSI score) | 0.76 (0.60% to 0.95%) | .016 | 1.11 (0.93% to 1.31%) | .243 | 1.02 (0.86% to 1.21%) | .799 |
| Anxiety symptoms (BAI score) | 0.99 (0.94% to 1.05%) | .703 | 0.97 (0.93% to 1.02%) | .224 | 1.02 (0.97% to 1.06%) | .465 |
| Depressive symptoms (IDS score) | 1.05 (1.01% to 1.09%) | .035 | 1.00 (0.97% to 1.04%) | .836 | 0.98 (0.95% to 1.01%) | .247 |
| Patch adherence (nonadherent) | 3.06 (1.74% to 5.36%) | <.001 | --- | --- | --- | --- |
| Counseling adherence (nonadherent) | 24.61 (8.48% to 71.38%) | <.001 | --- | --- | --- | --- |
| Psychiatric condition (Psych−) | 1.11 (0.32% to 3.88%) | .872 | 0.45 (0.16% to 1.21%) | .113 | 1.28 (0.52% to 3.07%) | .601 |
| Treatment duration (8 wk) | .204 | .002 | .018 | |||
| 24 wk | 1.55 (0.76% to 3.14%) | .230 | 1.67 (1.00% to 2.84%) | .050 | 2.20 (1.27%to 3.81%) | .005 |
| 52 wk | 0.80 (0.38% to 1.70%) | .570 | 0.61 (0.36% to 1.05%) | .074 | 1.46 (0.86% to 2.48%) | .158 |
| Psychiatric condition (Psych−) × treatment duration (8 wk) | .027 | .039 | .442 | |||
| Psych+ × 24 wk | 0.12 (0.02% to 0.68) | .017 | 1.61 (0.47% to 5.50%) | .450 | 0.60 (0.19%to 1.89%) | .381 |
| Psych+ × 52 wk | 0.81 (0.16% to 4.12) | .796 | 4.62 (1.31% to 16.31%) | .017 | 1.20 (0.37% to 3.88%) | .762 |
HS = high school; HSI = Heaviness of Smoking Index; IDS = Inventory of Depressive Symptomatology; BAI = Beck Anxiety Inventory.
Bold indicates significance at p <.05. Patch adherence was defined by self-reported use of ≥6 of 7 patches per week on average. Counseling adherence was defined by attendance at ≥10 of 12 smoking cessation counseling sessions. Abstinence was bioverified (CO ≤ 10 ppm) 7-day point prevalence.