TABLE 2.
Abstinence Rates and Paired Comparisons for the 7-, 30-, and 90-Day Point Prevalence
| Point-Prevalence Period | Assessment Point | UC | LDC | P | OR (95% CI) |
|---|---|---|---|---|---|
|
| |||||
| Full sample | |||||
| 7 d | 6 mo | 11.3% | 21.7% | <.001 | 2.18 (1.54–3.08) |
| 12 mo | 17.0% | 28.4% | <.001 | 1.93 (1.45–2.58) | |
| 18 mo | 20.7% | 29.3% | .001 | 1.59 (1.20–2.09) | |
| 24 mo | 24.3% | 33.1% | .002 | 1.54 (1.18–2.02) | |
| 30 d | 6 mo | 6.5% | 15.3% | <.001 | 2.58 (1.67–3.98) |
| 12 mo | 11.1% | 21.3% | <.001 | 2.18 (1.48–3.20) | |
| 18 mo | 14.5% | 20.9% | .009 | 1.57 (1.12–2.19) | |
| 24 mo | 18.6% | 25.8% | .009 | 1.52 (1.11–2.09) | |
| 90 d | 6 mo | 4.1% | 10.2% | <.001 | 2.65 (1.57–4.49) |
| 12 mo | 8.5% | 17.7% | <.001 | 2.31 (1.52–3.53) | |
| 18 mo | 11.0% | 18.3% | .001 | 1.82 (1.28–2.59) | |
| 24 mo | 15.3% | 22.1% | .007 | 1.58 (1.13–2.20) | |
| Men only | |||||
| 7 d | 6 mo | 8.5% | 20.2% | <.001 | 2.72 (1.64–4.52) |
| 12 mo | 15.7% | 29.7% | <.001 | 2.28 (1.50–3.47) | |
| 18 mo | 17.9% | 32.5% | <.001 | 2.20 (1.46–3.32) | |
| 24 mo | 21.8% | 35.9% | <.001 | 2.02 (1.36–2.98) | |
| 30 d | 6 mo | 4.4% | 13.7% | <.001 | 3.45 (1.78–6.69) |
| 12 mo | 10.8% | 23.1% | <.001 | 2.48 (1.47–4.18) | |
| 18 mo | 13.0% | 21.8% | .015 | 1.87 (1.13–3.09) | |
| 24 mo | 16.9% | 28.6% | .005 | 1.97 (1.24–3.14) | |
| 90 d | 6 mo | 2.5% | 8.3% | .007 | 3.58 (1.41–9.06) |
| 12 mo | 8.1% | 19.5% | <.001 | 2.77 (1.55–4.93) | |
| 18 mo | 9.7% | 18.9% | .004 | 2.17 (1.28–3.66) | |
| 24 mo | 13.8% | 22.7% | .012 | 1.84 (1.14–2.95) | |
| Women only | |||||
| 7 d | 6 mo | 14.3% | 23.3% | .015 | 1.83 (1.15–2.91) |
| 12 mo | 18.4% | 26.9% | .017 | 1.63 (1.09–2.44) | |
| 18 mo | 23.7% | 25.9% | .580 | 1.13 (0.74–1.72) | |
| 24 mo | 27.0% | 30.2% | .420 | 1.17 (0.80–1.70) | |
| 30 d | 6 mo | 8.8% | 16.9% | .009 | 2.12 (1.21–3.70) |
| 12 mo | 11.4% | 19.5% | .015 | 1.89 (1.13–3.15) | |
| 18 mo | 16.0% | 19.9% | .243 | 1.30 (0.83–2.04) | |
| 24 mo | 20.3% | 22.8% | .495 | 1.15 (0.76–1.75) | |
| 90 d | 6 mo | 5.8% | 12.1% | .011 | 2.25 (1.20–4.20) |
| 12 mo | 6.1% | 15.8% | .029 | 1.90 (1.07–3.38) | |
| 18 mo | 12.3% | 17.6% | .089 | 1.52 (0.94–2.47) | |
| 24 mo | 16.8% | 21.4% | .169 | 1.35 (0.88–2.08) | |
Abbreviations: CI, confidence interval; LDC, Libre del Cigarrillo; OR, odds ratio; UC, usual care.
OR and P values for each outcome and each assessment were derived from logistic regression for LDC versus UC with the relevant 20 imputed data sets. See Appendix 3 in the supporting information for a comparable table of percent abstinent and test results for 1) responders only and 2) missing follow-up smoking status imputed as smoking.