Analyses of smoking habits at the final (year 5) screening round using two different calculation methods: Model 1: missing values not included in analysis and Model 2: missing smoking status at year 5 classified as last known smoking status from previous screening rounds
| CT group | Ex-smokers (%) | Missing values (%) | Control group | Ex-smokers (%) | Missing values (%) | p Value* | |
|---|---|---|---|---|---|---|---|
| Baseline: Smokers/ex-smokers | 1545/507 | 25 | 0 | 1579/473 | 23 | 0 | 0.213 |
| Model 1: Smokers/ex-smoker | 1051/806 | 43 | 10 | 937/713 | 43 | 20 | 0.909 |
| Model 2: Smokers/ex-smoker | 1188/864 | 42 | 0 | 1244/808 | 40 | 0 | 0.075 |
*χ2 Test.