HRs from adjusted proportional hazard models of time to relapse, N=1785
| Variable | HR (95% CI) | p Value |
|---|---|---|
| Randomisation groups | ||
| Standard plus TEQ-10 vs standard | 0.85 (0.69 to 1.04) | 0.1171 |
| Standard plus TEQ-20 vs standard | 1.05 (0.85 to 1.31) | 0.6282 |
| Number of programme counselling calls | ||
| Planned+participant−initiated | 0.87 (0.82 to 0.92)*** | <0.0001 |
| Demographics | ||
| Gender | ||
| Female vs male | 0.90 (0.75 to 1.09) | 0.2838 |
| Age | 1.00 (0.99 to 1.01) | 0.5278 |
| Race | ||
| African–American vs Caucasian | 0.97 (0.75 to 1.26) | 0.8400 |
| Other vs White | 1.11 (0.67 to 1.84) | 0.6762 |
| Education | ||
| High school or less vs more than high school | 1.06 (0.87 to 1.30) | 0.5368 |
| Comorbidities | ||
| Any chronic comorbidity | 1.29 (1.01 to 1.64)* | 0.0430 |
| Tobacco use | ||
| Cigarettes per day | 1.01 (0.99 to 1.02) | 0.0639 |
| Time to first cigarette | ||
| 5 min vs all others | 1.08 (0.88 to 1.34) | 0.4430 |
| Number of quit attempts | ||
| 2–5 vs 0–1 | 1.14 (0.90 to 1.43) | 0.2657 |
| 6+ vs 0–1 | 1.32 (1.02 to 1.72)* | 0.0345 |
| Social contact with smokers | ||
| Work or home vs all others | 0.99 (0.80 to 1.24) | 0.9713 |
| Scale scores | ||
| Motivation to quit | 0.84 (0.79 to 0.90)*** | <0.0001 |
| Depression | 1.07 (1.01 to 1.13)* | 0.0198 |
All variables shown were included in each model. Estimates for each model were obtained by combining results across 10 multiply imputed data sets; 95% CIs are shown in parentheses.
*p<0.05; **p<0.01; ***p<0.001.
TEQ-10, Technology Enhanced Quitline-10.