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Table 5 Association between e-cigarette ever-use and ever/former smoking. Ever smoking was evaluated in the whole sample, while former smoking was evaluated among ever smokers

From: Knowledge and use of e-cigarettes among nursing students: results from a cross-sectional survey in north-eastern Italy

Risk factors Ever smoking   Former smoking  
OR (95% CI) p-value OR (95% CI) p-value
E-cigarette: ever vs never users 13.45 (9.26–19.55) < 0.001 0.33 (0.20–0.53) < 0.001
Gender (women vs men) 0.90 (0.76–1.06) 0.215 0.73 (0.44–1.22) 0.235
Family history of smoking
 None 1   1  
 Users of e-cigarettes 1.32 (0.89–1.95) 0.162 1.05 (0.69–1.60) 0.820
 Users of tobacco cigarettes 0.93 (0.73–1.19) 0.562 1.20 (0.58–2.50) 0.617
Housemates currently smoking
 None 1   1  
 Users of e-cigarettes 0.99 (0.72–1.37) 0.975 0.87 (0.62–1.21) 0.416
 Users of tobacco cigarettes 2.55 (1.66–3.91) < 0.001 0.55 (0.26–1.16) 0.116
Centre
 Verona 1   1  
 Vicenza 1.02 (0.99–1.05) 0.200 0.95 (0.86–1.05) 0.331
 Legnago 1.11 (1.08–1.14) < 0.001 1.44 (1.27–1.63) < 0.001
 Trento 0.97 (0.91–1.04) 0.423 1.29 (1.03–1.62) 0.028
 Bolzano 1.41 (1.37–1.45) < 0.001 1.38 (1.20–1.59) < 0.001
University class
 1st year 1   1  
 2nd year 1.12 (0.92–1.37) 0.269 2.31 (1.04–5.11) 0.039
 3rd year 1.35 (0.97–1.86) 0.072 1.47 (0.76–2.86) 0.254
  1. ORs (95% CI) and p-values were computed by logistic regression models, controlling for centre, gender, family history of smoking habits, smoking habits among current housemates, and university class. Significant results are highlighted in bold