Variables Students from urban areas ( Students from rural areas ( Age of sexual first masturbation 0.246 <15 years old 85 (4.1%, 85/2071) 35 (5.9%, 35/598) >15 years old 385 (18.6%, 385/2071) 122 (20.4%, 122/598) Age of sexual first intercourse 0.046 <15 years old 52 (2.5%, 52/2071) 24 (4.0%, 24/598) >15 years old 374 (18.1%, 374/2071) 101 (16.9%, 101/598) Sex after alcohol 0.851 Yes 122 (5.9%, 122/2071) 34 (5.7%, 34/598) Never 1949 (94.1%, 1949/2071) 564 (94.3%, 564/598) Contraceptive methods used at first sex 0.493 Condom 126 (6.1%, 126/2071) 31 (5.2%, 31/598) Others such as pills 227 (11.0%, 227/2071) 74 (12.4%, 74/598) No 71 (3.4%, 71/2071) 20 (3.3%, 20/598) Condom use at last sexual intercourse <0.0001 Yes 188 (9.1%, 188/2071) 28 (4.7%, 28/598) No 238 (11.5%, 238/2071) 97 (16.2%, 97/598) The last sexual partner <0.0001 Heterosexual 258 (12.5%, 258/2071) 44 (7.4%, 44/598) Homosexual and/or bisexual 97 (4.7%, 97/2071) 43 (7.2%, 43/598) Commercial 73 (3.5%, 73/2071) 37 (6.2%, 37/598) Condom use with regular sex partners 0.028 Almost always 88 (4.2%, 88/2071) 13 (2.2%, 13/598) Sometimes 282 (13.6%, 282/2071) 96 (16.1%, 96/598) Never 52 (2.5%, 52/2071) 15 (8.7%, 52/598) Condom use with casual sex partners 0.478 Almost always 74 (3.6%, 74/2071) 21 (3.5%, 21/598) Sometimes 199 (9.6%, 199/2071) 75 (12.5%, 75/598) Never 29 (1.4%, 29/2071) 13 (2.2%, 13/598) Once involved with prostitution 0.004 Yes 73 (3.5%, 73/2071) 37 (6.2%, 37/598) No 1998 (96.5%, 1998/2071) 561 (93.8%, 561/598) Number of sexual partners during the last year 0.605 None 1691 (81.7%, 1691/2071) 483 (80.8%, 483/598) 1 244 (11.8%, 244/2071) 70 (11.7%, 70/598) ≥2 134 (6.5%, 134/2071) 44 (7.4%, 44/598) Vaginal sex with condom <0.0001 Yes 167 (8.1%, 167/2071) 23 (3.8%, 23/598) No 1904 (91.9%, 1904/2071) 573 (95.8%, 573/598) Vaginal sex without condom 0.765 Yes 145 (7.0%, 145/2071) 44 (7.4%, 44/598) No 1926 (93.0%, 1926/2071) 554 (92.6%, 554/598) Oral sex with condom 0.050 Yes 97 (4.7%, 97/2071) 40 (6.7%, 40/598) No 1974 (95.3%, 1974/2071) 558 (93.3%, 558/598) Oral sex without condom 0.360 Yes 105 (5.1%, 105/2071) 36 (6.0%, 36/598) No 1966 (94.9%, 1966/2071) 562 (93.4%, 562/598) Anal sex with condom 0.638 Yes 42 (2.0%, 42/2071) 14 (2.3%, 14/598) No 2029 (98.0%, 2029/2071) 584 (97.7%, 584/598) Anal sex without condom 0.296 Yes 35 (1.7%, 35/2071) 14 (2.3%, 14/598) No 2036 (98.3%, 2036/2071) 584 (97.7%, 584/598) Once being diagnosed as having STDs 0.006 Yes 156 (7.5%, 156/2071) 66 (11.0%, 66/598) No 1915 (92.5%, 1915/2071) 532 (89.0%, 532/598)
