Table 3.
Period of first awareness of sex, exposure to pornographic media, attitude toward sex by gender and grade
| Characteristics | Male (%) | Female (%) | ||||||||||
| Grade I (n = 3728) | Grade II (n = 3308) | Grade III (n = 2949) | Grade IV (n = 1270) | Total (n = 11255) | P value* | Grade I (n = 3708) | Grade II (n = 3375) | Grade III (n = 2869) | Grade IV (n = 1286) | Total (n = 11238) | P value* | |
| Period became aware of sex | ||||||||||||
| Before high school | 65.6 | 59.0 | 52.8 | 52.5 | 58.8 | <0.001 | 42.3 | 32.3 | 30.0 | 26.7 | 34.4 | <0.00 |
| High school | 32.6 | 36.6 | 39.3 | 37.2 | 36.1 | 51.9 | 52.3 | 45.1 | 41.4 | 49.1 | 1 | |
| University | 1.3 | 3.8 | 7.4 | 9.8 | 4.6 | 5.5 | 15.1 | 24.7 | 31.4 | 16.2 | ||
| Missing | 0.4 | 0.7 | 0.4 | 0.6 | 0.5 | 0.3 | 0.3 | 0.2 | 0.5 | 0.3 | ||
| First exposure to pornographic media† | ||||||||||||
| Early (≤ 16 year-old) | 44.4 | 31.8 | 29.8 | 28.5 | 35.1 | <0.001 | 10.0 | 6.8 | 5.6 | 3.4 | 7.2 | <0.00 |
| Late (≥ 17 year-old) | 27.3 | 40.4 | 46.2 | 52.3 | 38.9 | 7.6 | 13.4 | 19.9 | 22.3 | 14.2 | 1 | |
| Never | 19.1 | 11.2 | 8.4 | 8.3 | 12.8 | 80.4 | 77.5 | 71.0 | 70.9 | 76.0 | ||
| Age unknown/Missing‡ | 9.2 | 16.6 | 15.6 | 10.9 | 13.2 | 2.0 | 2.4 | 3.4 | 3.3 | 2.6 | ||
| First exposure to pornographic website | ||||||||||||
| Early (≤ 16 year-old) | 13.7 | 7.0 | 3.2 | 1.8 | 7.6 | <0.001 | 0.9 | 0.5 | 0.1 | 0.2 | 0.5 | <0.00 |
| Late (≥ 17 year-old) | 42.5 | 55.0 | 67.1 | 75.4 | 56.3 | 5.0 | 8.2 | 15.4 | 15.9 | 9.8 | 1 | |
| Never | 35.7 | 22.3 | 14.9 | 11.5 | 23.6 | 93.3 | 90.1 | 81.9 | 81.3 | 88.1 | ||
| Age unknown/Missing‡ | 8.1 | 15.7 | 14.9 | 11.3 | 12.5 | 0.9 | 1.2 | 2.5 | 2.6 | 1.6 | ||
| Meet a girl/boy friend over the Internet | ||||||||||||
| Yes | 51.3 | 49.4 | 52.2 | 52.2 | 51.1 | 0.31 | 42.9 | 40.6 | 47.1 | 47.0 | 43.8 | <0.00 |
| No | 48.4 | 50.3 | 47.5 | 47.6 | 48.6 | 56.9 | 59.3 | 52.9 | 52.9 | 56.1 | 1 | |
| Missing | 0.3 | 0.3 | 0.3 | 0.2 | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | ||
| Approve of sex during high school | ||||||||||||
| Disapprove | 61.1 | 60.9 | 61.5 | 71.1 | 62.3 | <0.001 | 84.0 | 87.3 | 86.8 | 88.5 | 86.2 | <0.00 |
| Approve/Don't know | 37.2 | 35.4 | 35.6 | 27.6 | 35.2 | 15.4 | 12.0 | 12.3 | 10.3 | 13.0 | 1 | |
| Missing | 1.7 | 3.7 | 2.9 | 1.3 | 2.6 | 0.6 | 0.7 | 0.9 | 1.2 | 0.8 | ||
| Approve of sex before marriage | ||||||||||||
| Disapprove | 14.1 | 12.0 | 9.4 | 12.4 | 12.1 | <0.001 | 36.4 | 29.7 | 26.7 | 26.2 | 30.8 | <0.00 |
| Approve/Don't know | 83.4 | 83.5 | 86.6 | 85.8 | 84.5 | 62.6 | 69.0 | 71.9 | 72.2 | 68.0 | 1 | |
| Missing | 2.5 | 4.5 | 4.0 | 1.7 | 3.4 | 1.0 | 1.3 | 1.3 | 1.6 | 1.2 | ||
| Approve of commercial sex | ||||||||||||
| Disapprove | 69.9 | 68.4 | 63.4 | 65.3 | 67.3 | <0.001 | 86.5 | 85.4 | 83.2 | 83.1 | 84.9 | <0.00 |
| Approve/Don't know | 28.1 | 27.8 | 33.4 | 32.9 | 29.9 | 12.9 | 13.9 | 15.8 | 15.6 | 14.2 | 1 | |
| Missing | 2.0 | 3.8 | 3.2 | 1.8 | 2.8 | 0.7 | 0.7 | 1.0 | 1.2 | 0.8 | ||
*Chi square test for linear trend in proportion.
† Including pornographic novel, magazine, and/or video.
‡ Missing cases are less than 1% for each grade among both male and female students.