Table 2.
Primary and Secondary Outcomes in the COach2Quit Trial
| Intervention (n = 39) | Control (n = 50) | p Value | |
|---|---|---|---|
| COppm baseline, median (IQR) | 23.0 (18.0, 33.0) | 22.0 (14.0, 30.0) | |
| COppm 30 days, median (IQR) | 19.5 (15.0, 26.0) | 18.5 (10.0, 28.0) | |
| COppm change (30 days − baseline), median (IQR) | −3.0 (−12.0, 2.0) | −2.5 (−9.0, 2.0) | .52 |
| Cigarettes/day baseline, median (IQR) | 10.0 (6.0, 20.0) | 10.0 (8.0, 20.0) | |
| Cigarettes/day 30 days, median (IQR) | 5.0 (4.0, 10.0) | 6.0 (3.0, 10.0) | |
| Cigarettes/day change (30 days − baseline), median (IQR) | −5.5 (−14.0, −1.0) | −6.0 (−10.0, −2.0) | .84 |
| ≤10 COppm at 30 days, n (%)a | 2 (5) | 9 (18) | .07 |
| Self-reported and biochemically verified cessation at 30 days, n (%) | 1 (3) | 1 (2) | |
| RFQ score baseline, mean (95% CI) | 2.6 (2.4% to 2.8%) | 2.6 (2.4% to 2.8%) | |
| RFQ score 30 days, mean (95% CI) | 2.7 (2.4% to 3.0%) | 2.5 (2.3% to 2.7%) | |
| Unadjusted % change in RFQ score, mean (95% CI) | 6.3 (−2.2% to 14.8%) | −3.6 (−9.2% to 2.1%) | .05 |
IQR = interquartile range; CI = confidence interval; RFQ = Reasons for Quitting scale.
The Wilcoxon’s rank sum test was used to compare medians between groups. t tests were used to compare means between groups. Chi-square tests were used to compare proportions between groups.
aOnly includes participants who had baseline CO levels >10 ppm.