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Table 2 Sexual behaviors of respondents by gender and grade

From: Sexual behavior and awareness of Chinese university students in transition with implied risk of sexually transmitted diseases and HIV infection: A cross-sectional study

Characteristics Male (%)   Female (%)  
  Grade I Grade II Grade III Grade IV Total Pvalue* Grade I Grade II Grade III Grade IV Total Pvalue*
Sexual experience†             
Yes 11.7 16.7 23.8 22.6 17.6 <0.001 5.4 7.7 11.6 13.1 8.6 <0.001
No 88.3 83.3 76.2 77.4 82.4   94.6 92.3 88.4 86.9 91.4  
Time of first sexual intercourse†             
Before university 8.9 7.2 7.2 2.8 7.3 <0.001 2.9 1.7 1.7 0.3 1.9 <0.001
University 2.5 8.9 15.6 19.1 9.7   2.1 5.6 9.4 11.9 6.1  
Not specified 0.3 0.6 1.0 0.7 0.6   0.4 0.4 0.6 0.9 0.5  
Partner type (in previous year)‡             
Ever commercial/casual partner 18.8 16.3 13.1 10.2 14.7 0.002 9.2 5.0 3.8 1.7 4.7 0.007
Regular partner only 79.3 80.2 84.2 88.1 82.7   87.2 90.6 94.8 95.8 92.5  
Missing 1.9 3.5 2.7 1.8 2.6   3.7 4.4 1.4 2.5 2.8  
Number of sexual partners (in previous year)‡             
≥2 22.4 18.5 17.2 10.6 17.6 0.001 11.0 13.2 11.8 12.7 12.2 0.85
1 70.2 70.1 74.1 84.1 73.8   77.1 81.1 82.2 81.4 80.8  
Missing 7.4 11.4 8.8 5.3 8.6   11.9 5.7 6.1 5.9 7.0  
Condom use (in previous year)‡             
Never/Rarely 46.3 35.9 31.0 27.9 35.1 <0.001 43.1 35.8 31.9 33.1 35.2 0.08
Sometimes 23.9 15.8 19.9 15.9 19.1   14.7 16.4 19.7 20.3 18.0  
Often/Always 25.6 41.3 41.9 50.0 39.5   32.1 32.7 35.7 35.6 34.2  
Missing 4.2 7.1 7.2 6.2 6.4   10.1 15.1 12.7 11.0 12.5  
Pill use (in previous year)‡             
Never/Rarely 58.9 53.0 58.1 58.0 56.9 0.81 46.8 47.8 53.1 47.5 49.4 0.63
Sometimes 21.0 19.8 17.0 11.1 17.7   17.4 18.9 14.6 21.2 17.5  
Often/Always 17.5 23.9 21.2 28.3 22.2   30.3 29.6 28.6 28.0 29.0  
Missing 2.6 3.3 3.7 2.7 3.2   5.5 3.8 3.8 3.4 4.0  
Gender of sexual partner (lifetime)¶             
Homosexual/Bisexual 2.3 3.8 4.0 3.1 3.4 0.32 3.5 5.4 1.2 1.8 2.9 0.04
Heterosexual only 91.3 86.8 87.8 90.6 88.7   82.6 83.5 88.3 85.1 85.3  
Missing 6.4 9.4 8.3 6.3 7.9   13.9 11.2 10.5 13.1 11.8  
History of pregnancy of partner or themselves (lifetime)¶             
Yes 6.6 9.4 11.0 12.5 9.8 <0.01 8.5 8.8 11.4 10.1 9.9 0.40
No/Don't know 87.0 82.1 81.4 81.9 82.9   77.1 79.6 77.8 78.0 78.2  
Missing 6.4 8.5 7.7 5.6 7.3   14.4 11.5 10.8 11.9 11.9  
History of induced abortion of partner or themselves (lifetime)¶             
Yes 6.6 7.8 10.7 12.9 9.3 0.001 9.5 9.2 10.5 10.7 10.0 0.65
No/Don't know 86.5 82.8 81.8 81.5 83.1   75.6 79.6 78.4 77.4 78.0  
Missing 6.9 9.4 7.5 5.6 7.6   14.9 11.2 11.1 11.9 12.0  
History of being diagnosed as having STDs (lifetime)¶             
Yes 1.1 1.4 1.3 1.0 1.3 0.88 1.0 1.9 1.8 0.6 1.5 0.80
No 88.6 82.8 87.1 88.9 86.5   80.1 81.5 83.8 81.0 81.9  
Missing 10.3 15.7 11.7 10.1 12.3   18.9 16.5 14.4 18.5 16.6  
  1. * Chi square test for linear trend in proportion.
  2. † Among all respondents.
  3. ‡ Among respondents who had sex in the previous year (n = 309, 368, 513, and 226 for male grade I, II, III and IV students, respectively, and n = 109, 159, 213, and 118 for female grade I, II, III, and IV students, respectively).
  4. ¶ Among all sexually active respondents (n = 437, 553, 703, and 287 for male grade I, II, III, and IV students, respectively, and n = 201, 260, 334, and 168 for female grade I, II, III, and IV students, respectively).