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Table 1 Comparison of baseline characteristics of students in the intervention and control groups

From: Efficacy of a smoking cessation program in a population of adolescent smokers in vocational schools: a public health evaluative controlled study

  Intervention Control  
N = 770 (42.4%) N = 1,044 (57.6%)  
  N % μ SD* N % μ SD* p**
Age 735   16.8 1.0 998   16.9 1.0 0.03
Sex 0.002
  Male 630 81.8    908 87.0    
  Female 140 18.2    136 13.0    
Area of training 0.09
  BPW£ 472 62.3    681 65.6    
  Catering industry 171 22.6    236 22.7    
  Personal services 115 15.2    121 11.7    
Smoking status 0.25
  Non-smoker 334 43.4    434 41.6    
  Smoker 386 50.1    557 53.4    
  Ex-smoker 50 6.5    53 5.1    
  1. £ BPW = building and public works.
  2. *SD = standard deviation **p-value <0.05. Data are mean ± SD. BPW: building and public works.