Table 2. Sex-related acknowledge, attitude and behavior among students who were only-child and students with siblings.
| Variablesa | Total (n = 4769) | Only-child | |||
| Yes (n = 1954) | No (n = 2815) | t or χ2b | p | ||
| Knowledge | |||||
| Score in Reproduction and Contraception knowledge(Mean ± SD) | 16.0±7.3 | 17.6±7.0 | 14.9±7.2 | 12.745 | <0.001 |
| Score in Sexually Transmitted Diseases and AIDS Knowledge(Mean ± SD) | 17.6±4.1 | 18.3±3.9 | 17.2±4.2 | 9.474 | <0.001 |
| Score in Sexual and Reproductive Health Knowledge(Mean ± SD) | 33.6±10.3 | 35.9±9.8 | 32.1±10.3 | 12.820 | <0.001 |
| Attitudes | |||||
| Agreed premarital sex | 2837(59.5) | 1313(67.2) | 1524(54.1) | 81.592 | <0.001 |
| Agreed multiple sex partners | 547(11.5) | 293(15.0) | 254(9.0) | 40.507 | <0.001 |
| Agreed one night stand | 1260(26.4) | 575(29.4) | 685(24.3) | 15.389 | <0.001 |
| Agreed extramarital lover | 936(19.6) | 450(23.0) | 486(17.3) | 24.301 | <0.001 |
| Agreed homosexuality | 2885(60.5) | 1300(66.5) | 1585(56.3) | 50.455 | <0.001 |
| Agreed condom should be used in premarital sexual behavior | 4073(85.4) | 1765(90.3) | 2308(82.0) | 64.335 | <0.001 |
| Agreed condoms are the safest measure for preventing STD and unintended pregnancy | 2594(54.4) | 1265(64.7) | 1329(47.2) | 142.839 | <0.001 |
| Behaviors | |||||
| Work at place of entertainment (yes) | 308(6.5) | 179(9.2) | 129(4.6) | 40.015 | <0.001 |
| Has had a boyfriend(yes) | 3167(66.4) | 1439(73.6) | 1728(61.4) | 77.694 | <0.001 |
| Practice masturbation (yes) | 1137(23.8) | 429(22.0) | 708(25.2) | 6.488 | 0.011 |
| Ever had sexual intercourse (yes) | 863(18.1) | 468(24.0) | 395(14.0) | 76.562 | <0.001 |
a
Missed cases were excluded.
b
Significance tests was chi-squared tests for dichotomous variables.