| | Tested Variables | 6 months | 6 months adjusted | 12 months | 12 months adjusted | | R.R. | C.I. 95% | P-value | O.R. adj. | C.I. 95% | P-value | R.R. | C.I. 95% | P-value | O.R. adj. | C.I. 95% | -value |
| | Age | | | | | | | | | | | | | | 50 years | 1 | | | 1 | | | 1 | | | 1 | | | | ≤50 years | 1.49 | 1.06–2.44 | .02 | 1.50 | 0.50–4.45 | .46 | 1.37 | 1.02–2.52 | | 1.36 | 0.43–4.27 | .6 |
| | Self-efficacy test | | | | | | | | | | | | | | ≥7 | 1 | | | 1 | | | 1 | | | 1 | | | | 7 | 1.84 | 1.14–2.99 | .016 | 2.99 | 0.99–9.04 | .052 | 1.47 | 1.01–2.14 | | 2.72 | 0.77–9.54 | .12 |
| | Course frequency | | | | | | | | | | | | | | ≥7 | 1 | | | 1 | | | 1 | | | 1 | | | | 7 | 1.76 | 1.32–2.35 | .006 | 8.70 | 1.56–48.36 | .013 | 1.45 | 1.11–1.88 | | 3.41 | 0.6–19.29 | .16 |
| | Cigarettes consumption | | | | | | | | | | | | | | 20/day | 1 | | | 1 | | | | | | | | | | ≥20/day | 1.45 | 0.93–2.26 | .07 | 0.97 | 0.21–4.33 | .97 | | | | | | |
| | Nicotine dependence | | | | | | | | | | | | | | low degree (Fagestrom 5) | 1 | | | 1 | | | | | | | | | | high/very high degree (Fagestrom ≥5) | 1.34 | 0.90–1.98 | .12 | 0.81 | 0.21–3.22 | .77 | | | | | | |
| | Marital status | | | | | | | | | | | | | | married/live-in partner | 1 | | | 1 | | | | | | | | | | living alone | 1.38 | 0.97–1.97 | .06 | 2.04 | 0.71–5.88 | .18 | | | | | | |
| | Smokers in the family | | | | | | | | | | | | | | not smoking father | | | | | | | 1 | | | 1 | | | | smoking father | | | | | | | 1.61 | 0.87–2.97 | | 2.48 | 0.74–8.26 | .14 |
| | Test | Statistic | D.F. | P-value | | Test | Statistic | D.F. | P-value | | | Score | 15.173 | 6 | .019 | | Score | 7.1913 | 4 | .1261 | | | Likelihood Ratio | 16.7813 | 6 | .0101 | | Likelihood Ratio | 7.8354 | 4 | .0978 | |
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