Table 5 Multiple logistic regression analysis of predictors for relapse in former smokers at baseline
PredictorOdds ratiop Value
Years of smoking abstinence0.57 (0.48 to 0.67)<0.01
Pack-years1.01 (0.99 to 1.03)0.14
FEV1/FVC0.87 (0.73 to 1.04)0.13
CT vs control0.87 (0.54 to 1.41)0.58
Gender0.77 (0.47 to 1.26)0.29
Age0.90 (0.85 to 0.96)<0.01

  • Included in the model are 744 continuous ex-smokers and 86 re-starters (only complete data).

  • FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.