Table 1 Distribution of sexual habits in the study population according to age at enrolment into the study
Age at entry in the study (years) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sexual habits | Total | 18-20 (n = 1,958) | 21-25 (n = 2,867) | 26-30 (n = 3,469) | 31-35 (n = 4,430) | 36-40 (n = 4,905) | 41-45 (n = 4,781) | |||||||
N | % | % | (95% CI) | % | (95% CI) | % | (95% CI) | % | (95% CI) | % | (95% CI) | % | (95% CI) | |
Total | 22,410 | 100 | 8.7 | (8.4-9.1) | 12.8 | (12.4-13.3) | 15.5 | (15.0-16.0) | 19.8 | (19.3-20.3) | 21.9 | (21.4-22.4) | 21.3 | (20.8-21.9) |
No sexual intercourse with a female partner | 916 | 4.1 | 15.6 | (14.0-17.3) | 7.6 | (6.7-8.7) | 3.5 | (2.9-4.1) | 2.4 | (1.9-2.8) | 1.9 | (1.6-2.3) | 1.6 | (1.2-1.9) |
Lifetime number of female sexual partners | ||||||||||||||
1 | 2,000 | 8.9 | 14.8 | (13.3-16.5) | 10.3 | (9.2-11.5) | 8.3 | (7.4-9.3) | 8.5 | (7.7-9.4) | 7.7 | (7.0-8.5) | 7.7 | (7.0-8.5) |
2-4 | 4,670 | 20.8 | 32.6 | (30.6-34.8) | 24.3 | (22.8-25.9) | 21.8 | (20.4-23.2) | 18.0 | (16.9-19.2) | 18.9 | (17.8-20.0) | 17.9 | (16.8-19.0) |
5-9 | 5,292 | 23.6 | 21.5 | (19.7-23.4) | 26.1 | (24.5-27.7) | 25.9 | (24.4-27.4) | 23.4 | (22.1-24.6) | 22.9 | (21.7-24.1) | 22.4 | (21.2-23.6) |
≥ 10 | 9,532 | 42.5 | 15.5 | (13.9-17.2) | 31.7 | (30.0-33.4) | 40.6 | (39.0-42.2) | 47.7 | (46.3-49.2) | 48.7 | (47.3-50.1) | 50.4 | (49.0-51.9) |
Number of new female sexual partners in the past 6 months | ||||||||||||||
0-1 | 19,172 | 85.6 | 62.1 | (59.9-64.3) | 70.4 | (68.7-72.1) | 84.6 | (83.4-85.8) | 90.5 | (89.6-91.4) | 92.7 | (92.0-93.5) | 93.0 | (92.2-93.7) |
≥ 2 | 2,186 | 9.8 | 22.1 | (20.2-23.9) | 21.5 | (19.9-23.0) | 11.3 | (10.3-12.4) | 6.6 | (5.9-7.4) | 4.8 | (4.2-5.4) | 4.6 | (4.0-5.2) |
Sex with a commercial sex worker | ||||||||||||||
Never | 18,889 | 84.3 | 81.2 | (79.4-82.9) | 84.4 | (83.1-85.8) | 84.9 | (83.7-86.1) | 84.1 | (83.0-85.2) | 85.2 | (84.2-86.2) | 84.3 | (83.2-85.3) |
Ever | 2,524 | 11.3 | 3.2 | (2.5-4.1) | 7.4 | (6.5-8.5) | 11.1 | (10.1-12.2) | 13.3 | (12.3-14.4) | 12.4 | (11.5-13.4) | 13.9 | (12.9-14.9) |