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Table 2 Socio-economic and demographic characteristics of study participants

From: Substance use, risky sexual behaviors, and their associations in a Chinese sample of senior high school students

  Total (N=2688) Males (N=1324) Females (N=1329) t/χ 2
Age (years, mean±SD) 17.17±0.72 17.20±0.74 17.14±0.70 1.81 a
Family income (%)     0.94 b
 Low (<1500) 15.9 15.2 16.4  
 Medium (1500–2499) 33.3 33.2 33.6  
 High (≥2500) 50.8 51.6 50.0  
Family structure     7.73b
 Single parent family 7.8 8.1 7.2  
 Nuclear family 66.0 63.7 68.5  
 Large family 26.2 28.1 24.2  
Father’s education level (%)     10.83** b
 Middle school and below 7.6 8.5 6.9  
 High school 45.6 42.4 48.7  
 College and above 46.8 49.2 44.5  
Mother’s education level (%)     7.08* b
 Middle school and below 9.4 9.3 9.6  
 High school 50.8 48.4 53.1  
 College and above 39.9 42.3 37.3  
  1. Family income was expressed in RMB(yuan)/person/month.
  2. a Independent-samples t test.
  3. b K*2 Chi-square Test.
  4. * P<0.05.
  5. ** P<0.01.