Table 3.
Multivariate Models Predicting Abstinence at 6 Months (ORs and 95% CIs)
| Modelsa | WebbOR (95% CI) | PhonecOR (95% CI) | Phone–WebdOR (95% CI) |
| # Calls | 0.67 (0.42–1.08) | 1.86 (1.47–2.35) | 1.57 (1.25–1.98) |
| Call duration | 1.04 (1.01–1.07) | 0.99 (0.98–1.00) | 0.99 (0.98–1.00) |
| Web logins | 1.19 (1.08–1.31) | – | 1.05 (0.96–1.15) |
| Web duration | 1.00 (0.99–1.00) | – | 1.00 (0.99–1.00) |
| Varenincline duration | 1.02 (1.01–1.03) | 1.02 (1.01–1.03) | 1.02 (1.01–1.03) |
| χ2(8) = 62.5, p < .0001 | χ2(6) = 63.5, p < .0001 | χ2(6) = 46.6, p < .0001 |
Note. OR = odds ratio.
a
Models controlled for baseline variables determined to be significantly associated with outcome based on their stepwise addition to the base model containing the utilization variables.
b
Baseline variables controlled for in the model: Heavy Smoking Index, ever used nicotine replacement therapy to quit, and support from family to quit.
c
Baseline variables controlled for in the model: Fagerström Test for Nicotine Dependence, ever used other aids to quit, and Internet use.
d
Baseline variables controlled for in the model: comfort conducting business online.