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Table 1 Socio-demographic characteristics of sexually active males by timing of sex initiation.

From: Early initiation of sexual activity: a risk factor for sexually transmitted diseases, HIV infection, and unwanted pregnancy among university students in China

Variables Timing of sex initiation
  BHS (n = 115)a HS (n = 705)a Univ (n = 1088)a
Current age    
   ≤ 19 21.4 24.3 6.7
   > 19 78.6 75.7 93.3
Grade    
   I 40.9 40.4 8.5
   II 30.4 28.9 26.9
   III 23.5 26.4 42.4
   IV 5.2 4.3 22.2
Familys' economic status    
   Rich 14.9 14.5 10.8
   Between 73.7 79.1 82.2
   Poor 11.4 6.4 7.0
Hometown area    
   Countryside 24.6 19.1 27.3
   Town/city 75.4 80.9 72.7
Mean age of first sex    
   ± SDb 15.53 ± 1.94 18.38 ± 1.25 20.44 ± 1.16
  1. a Data were shown in percentages, and the perentages of some items may not add up to 100 due to missing data.
  2. b SD, standard deviation.
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BMC Public Health

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