Table 6.
Logistic regression results using FTND and WI-PREPARE item scores as predictors of abstinence, 6 months postquit, cross-validation analysis.
| Single-item predictions |
Multiple-item predictions |
|||||
| b (OR) | Wald | p value | b (OR) | Wald | p value | |
| FTND | ||||||
| 1. Time to first cigarette in the morning | −.348 (0.706) | 10.24 | .001 | −.297 (0.743) | 4.87 | .027 |
| 2. Smoking where it is forbidden | −.444 (0.642) | 2.98 | .086 | −.324 (0.724) | 1.39 | .239 |
| 3. Cigarette most hate to give up | −.274 (0.760) | 1.75 | .187 | −.073 (0.929) | 0.10 | .758 |
| 4. Number of cigarettes per day | −.263 (0.769) | 4.20 | .040 | −.119 (0.887) | 0.71 | .401 |
| 5. Smoke more in the morning | −.299 (0.741) | 2.16 | .143 | −.004 (0.996) | 0.00 | .987 |
| 6. Smoke when ill | −.114 (0.892) | 0.31 | .576 | .156 (1.169) | 0.50 | .478 |
| Nagelkerke R2 | .030 | |||||
| WI-PREPARE | ||||||
| 1. Household smoking restriction | −.261 (0.770) | 1.64 | .200 | −.056 (0.946) | 0.07 | .799 |
| 2. Work smoking restriction | −.120 (0.887) | 0.35 | .555 | .005 (1.005) | .00 | .981 |
| 3. Smokers in environment | −.189 (0.828) | 0.76 | .384 | −.124 (0.883) | 0.31 | .576 |
| 4. Craving | −.097 (0.907) | 0.22 | .640 | .134 (1.143) | 0.36 | .546 |
| 5. Time to first cigarette in the morning | −.348 (0.706) | 10.03 | .002 | −.266 (0.767) | 4.43 | .035 |
| 6. Number of cigarettes per day | −.263 (0.769) | 4.17 | .041 | −.141 (0.868) | 0.96 | .327 |
| 7. Education | −.380 (0.684) | 6.09 | .014 | −.299 (0.742) | 3.52 | .061 |
| Nagelkerke R2 | .036 | |||||
Note. FTND, Fagerström Test for Nicotine Dependence; WI-PREPARE, Wisconsin Predicting Patients’ Relapse. Odds ratio (OR) indicates the change in likelihood of abstinence for each unit of change in the independent variable. The ORs for the FTND and the WI-PREPARE are not directly comparable.