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Table 3 Results of logistic regression analysis of smoking by gender among medical students

From: Prevalence of and factors associated with daily smoking among Inner Mongolia medical students in China: a cross-sectional questionnaire survey

Category Male Female
Crude OR (95%CI) P Adjusted OR (95%CI) P Crude OR (95%CI) P Adjusted OR (95%CI) P
Ethnicity   0.115   0.940   0.953   0.862
Han ethnicity 1.00     1.00    
Mongolian ethnicity 1.30 (1.02–1.65)   1.04 (0.74–1.46)   1.07 (0.62–1.85)   0.86 (0.41–1.82)  
Other 1.05 (0.68–1.64)   0.93 (0.51–1.68)   1.12 (0.40–3.12)   1.23 (0.35–4.35)  
Year of study   <0.001   <0.001   0.337   0.182
1 1.00     1.00    
2 1.17 (0.91–1.51)   1.08 (0.76–1.53)   0.87 (0.50–1.51)   0.96 (0.47–1.95)  
3 1.42 (1.09–1.87)   1.65 (1.12–2.43)   0.72 (0.36–1.42)   0.52 (0.21–1.28)  
4 2.25 (1.44–3.52)   3.85 (2.06–7.20)   0.86 (0.26–2.84)   1.11 (0.20–6.22)  
5 2.97 (1.35–6.54)   3.62 (1.18–11.1)   2.83 (0.84–9.49)   3.94 (0.83–18.59)  
Monthly expenses(yuan)   0.010   0.024   0.689   0.580
<300 1.00     1.00    
300–600 1.07 (0.60–1.89)   1.06 (0.51–2.23)   1.10 (0.46–2.63)   1.81 (0.56–5.63)  
600–1000 1.50 (0.85–2.65)   1.57 (0.75–3.31)   1.10 (0.45–2.74)   2.12 (0.59–7.60)  
>1000 1.59 (0.82–3.10)   2.07 (0.85–5.03)   1.91 (0.58–6.36)   3.23 (0.59–17.60)  
Residence   0.008   0.013   0.740   0.740
City 1.00     1.00    
Rural 1.17 (0.94–1.46)   1.63 (1.18–2.26)   1.06 (0.64–1.74)   1.45 (0.71–2.98)  
Pastoral 2.72 (1.52–4.86)   2.32 (1.08–4.97)   0.86 (0.20–3.64)   0.87 (0.16–4.80)  
Suburbs 1.10 (0.68–1.77)   1.33 (0.67–2.62)   1.80 (0.62–5.23)   1.13 (0.26–4.90)  
Faculty   <0.001   0.016   0.003   0.006
Clinical Medicine 1.00     1.00    
Public Health Administration and Medicine Information Management 1.70 (1.27–2.27)   1.26 (0.84–1.88)   1.02 (0.54–1.90)   0.83 (0.36–1.94)  
Medicine 0.68 (0.50–0.93)   0.64 (0.42–0.98)   0.18 (0.05–0.57)   0.12 (0.03–0.48)  
Traditional Chinese Medicine and Mongolian Medicine 0.73 (0.54–0.97)   0.87 (0.59–1.28)   0.64 (0.32–1.26)   0.53 (0.21–1.34)  
Other 0.52 (0.32–0.84)   0.49 (0.26–0.93)   0.33 (0.15–0.71)   0.30 (0.11–0.78)  
Do not care about people smoking around you   <0.001   <0.001   <0.001   0.067
No 1.00     1.00    
Yes 4.88 (3.92–6.07)   2.75 (2.08–3.64)   5.85 (3.66–9.36)   1.81 (0.96–3.43)  
Smoking is a sign of civilization   0.126   0.766   0.641   0.914
No 1.00     1.00    
Yes 1.18 (0.95–1.47)   0.96 (0.71–1.29)   0.89 (0.54–1.47)   0.96 (0.48–1.92)  
Smoking is one of the causes of air pollution   <0.001   <0.001   <0.001   <0.001
No 1.00     1.00    
Yes 0.10 (0.08–0.13)   0.23 (0.16–0.31)   0.02 (0.01–0.04)   0.04 (0.02–0.08)  
Teachers should not smoke   <0.001   0.582   <0.001   0.350
No 1.00     1.00    
Yes 0.36 (0.29–0.45)   1.09 (0.80–1.50)   0.34 (0.21–0.54)   1.36 (0.72–2.58)  
The State shall take measures to stop smoking   <0.001   <0.001   <0.001   0.360
No 1.00     1.00    
Yes 0.18 (0.14–0.22)   0.53 (0.39–0.73)   0.10 (0.06–0.17)   0.72 (0.36–1.45)  
Eliminate smoking on campus   <0.001   <0.001   <0.001   <0.001
No 1.00     1.00    
Yes 0.09 (0.07–0.11)   0.18 (0.13–0.24)   0.05 (0.03–0.10)   0.11 (0.06–0.23)  
Eliminate smoking in classroom   <0.001   0.075   <0.001   0.043
No 1.00     1.00    
Yes 0.17 (0.13–0.23)   0.69 (0.46–1.04)   0.08 (0.05–0.13)   0.41 (0.18–0.97)  
Smoking is harmful to one’s health   0.967   <0.001   0.680   <0.001
No 1.00     1.00    
Yes 1.01 (0.64–1.59)   4.40 (2.21–8.75)   0.78 (0.24–2.52)   28.31 (4.67–172.58)  
Smoking is harmful to the health of others   0.005   0.216   <0.001   0.441
No 1.00     1.00    
Yes 0.59 (0.41–0.85)   1.46 (0.80–2.65)   0.22 (0.11–0.43)   0.62 (0.18–2.11)  
  1. OR: Odds Ratio, CI: Confidence Interval.
  2. p values less than 0.05 were considered statistically significant.