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Table 3 Results of automatic (step-up) binary logistic regression analyses with tobacco use disorder (TUD) as dependent variable (never-smokers as reference group) and the STin2.12 allele (regression 1) or STin.10/10 genotype (regression 2) and the other listed variables as explanatory variables

From: SLC6A4STin2 VNTR genetic polymorphism is associated with tobacco use disorder, but not with successful smoking cessation or smoking characteristics: a case control study

  Variables Wald df p value OR 95% CI
Regression 1 STin2.12 allele 8.68 1 0.003 2.68 1.39 – 5.18
  Mood disorders 6.51 1 0.011 1.97 1.17 – 3.32
  Years of education 72.98 1 <0.001 0.76 0.71 – 0.81
Regression 2 STin2.10/10 genotype 8.14 1 0.004 0.38 0.20 – 0.74
  Mood disorders 6.64 1 0.010 1.98 1.18 – 3.34
  Years of education 72.99 1 <0.001 0.76 0.71 – 0.81
  1. OR: odds ratio with 95% CI: 95% confidence interval.