Table 2.
Results of two logistic regression models predicting smoking cessation outcomes
| Complete Case Analysis (n=414*)1 | Intent to Treat Analysis (n=699*)2 | |||||
|---|---|---|---|---|---|---|
|
|
||||||
| Odds Ratio | 95% Confidence Interval |
p-valuesa | Odds Ratio |
95% Confidence Interval |
p-valuesa | |
|
|
||||||
| E-cigarette | ||||||
| E-cigarette use | .95 | 0.53, 1.72 | - | 2.00 | 1.23, 3.26 | p = 0.005 |
| No e-cigarette use^ | (1.00) | - | (1.00) | - | ||
| Nicotine dependence | ||||||
| High nicotine dependence | 1.22 | 0.78, 1.91 | - | 1.14 | 0.77, 1.69 | - |
| Low nicotine dependence^ | (1.00) | - | (1.00) | - | ||
| Number of past quit attempts | ||||||
| Tried quitting at least twice | 1.77 | 1.14, 2.74 | p = 0.010 | 1.83 | 1.25, 2.67 | p = 0.002 |
| Tried quitting one time or less^ | (1.00) | - | (1.00) | - | ||
| Cancer diagnosis | ||||||
| Thoracic or head and neck | .56 | 0.36, 0.89 | p = 0.014 | 0.71 | 0.48, 1.04 | - |
| Other^ | (1.00) | - | (1.00) | - | ||
*
Data are given as sample size except where noted. Counts do not always add up to the total sample size due to missing responses and deceased patients.
1
Complete Case Analysis: Self-reported seven day point prevalence abstinence at six months, excluding lost to follow-up patients.
2
Intent to Treat analysis: Self-reported seven day point prevalence abstinence at six months, lost to follow-up patients assumed to be smoking.
a
p-values were calculated using chi-square statistics for categorical variables and independent-sample t-test for continuous variables; p-values greater than 0.05 were omitted.
^
Reference categories