Table 3.
Logistic Regression Models for 26 and 52 Week Point-Prevalence Abstinence
| 26 Weeks Post-Target Quit Day | 52 Weeks Post-Target Quit Day | |||||||
|---|---|---|---|---|---|---|---|---|
| Unadjusted | Adjusted** | Unadjusted | Adjusted** | |||||
| Variable | b | p-value | b | p-value | b | p-value | b | p-value |
| Intercept | −.55 | <.001 | −.19 | .72 | −1.01 | <.001 | −1.30 | .02 |
| Extended Medication | .25 | .01 | .28 | .01 | .34 | .01 | .35 | .01 |
| Maintenance Counseling | −.01 | .96 | .01 | .92 | .01 | .96 | −.01 | .94 |
| Medication Adherence Counseling (MAC) |
−.04 | .70 | −.05 | .60 | .02 | .89 | .04 | .78 |
| Automated Adherence Calls | .06 | .58 | .06 | .57 | −.16 | .21 | −.18 | .18 |
| Helping Hand (HH) Counseling | −.01 | .94 | −.05 | .61 | .09 | .51 | .07 | .62 |
| Extended Medication × Maintenance Counseling |
.07 | .46 | .04 | .70 | .06 | .68 | .06 | .68 |
| Extended Medication × MAC | −.13 | .20 | −.10 | .35 | −.25 | .046 | −.24 | .06 |
| Extended Medication × Adherence Calls |
.02 | .82 | −.03 | .80 | .18 | .15 | .16 | .21 |
| Extended Medication × HH Counseling |
.04 | .73 | .03 | .76 | .03 | .82 | .03 | .84 |
| Maintenance Counseling × MAC | −.02 | .87 | −.05 | .67 | .12 | .36 | .11 | .42 |
| Maintenance Counseling × Adherence Calls |
.02 | .85 | −.01 | .93 | .15 | .26 | .11 | .40 |
| Maintenance Counseling × HH Counseling |
−.01 | .93 | −.04 | .71 | −.18 | .15 | −.21 | .10 |
| MAC × Adherence Calls | .23 | .02 | .21 | .047 | .44 | .001 | .43 | <.01 |
| MAC × HH Counseling | .09 | .38 | .07 | .50 | .17 | .21 | .18 | .20 |
| Adherence Calls × HH Counseling | −.18 | .07 | −.21 | .047 | −.31 | .03 | −.33 | .02 |
| Extended Medication × Maintenance Counseling × MAC |
−.13 | .20 | −.13 | .23 | −.20 | .12 | −.20 | .14 |
| Extended Medication × Maintenance Counseling × Adherence Calls |
.00 | .97 | −.02 | .87 | .08 | .56 | .09 | .50 |
| Extended Medication × Maintenance Counseling × HH Counseling |
−.08 | .41 | −.19 | .07 | .16 | .20 | .12 | .34 |
| Extended Medication × MAC × Adherence Calls |
−.19 | .050 | −.23 | .03 | −.35 | <.01 | −.38 | <.01 |
| Extended Medication × MAC × HH Counseling |
−.01 | .96 | .01 | .92 | −.13 | .34 | −.14 | .35 |
| Extended Medication × Adherence Calls × HH Counseling |
.15 | .12 | .13 | .22 | .26 | .06 | .24 | .10 |
| Maintenance Counseling × MAC × Adherence Calls |
.16 | .11 | .17 | .11 | .17 | .23 | .18 | .22 |
| Maintenance Counseling × MAC × HH Counseling |
.32 | .001 | .36 | .001 | .35 | <.01 | .37 | <.01 |
| Maintenance Counseling × Adherence Calls × HH Counseling |
−.14 | .17 | −.15 | .16 | −.24 | .08 | −.24 | .08 |
| MAC × Adherence Calls × HH Counseling |
−.22 | .03 | −.25 | .02 | .02 | .87 | .00 | .97 |
| Extended Medication × Maintenance Counseling × MAC × Adherence Calls |
−.17 | .08 | −.15 | .15 | −.13 | .37 | −.10 | .51 |
| Extended Medication × Maintenance Counseling × MAC × HH Counseling |
−.18 | .07 | −.20 | .06 | −.26 | .053 | −.27 | .053 |
| Extended Medication × Maintenance Counseling × Adherence Calls × HH Counseling |
.12 | .23 | .12 | .26 | .18 | .18 | .19 | .18 |
| Extended Medication × MAC × Adherence Calls × HH Counseling |
−.13 | .19 | −.13 | .23 | −.20 | .14 | −.20 | .14 |
| Maintenance Counseling × MAC × Adherence Calls × HH Counseling |
.06 | .54 | .06 | .54 | .13 | .29 | .12 | .33 |
| Extended Medication × Maintenance Counseling × MAC × Adherence Calls × HH Counseling*** |
.12 | .22 | .13 | .21 | - | - | - | - |
Note. Bold indicates p < .05.
**
Adjusted model controlled for gender, race (White vs. non-White), age, education (up to high school diploma vs. at least some college), the Heaviness of Smoking Index, baseline exhaled carbon monoxide, and healthcare system (A vs. B); (N = 539 due to missing covariates).
***
At Week 52, the full logistic regression model could not be fitted (due to a null value cell) so the 5-way interaction was omitted from that model.