Table 2.
Sexual history by age group
| Age group | Female | Male | Total | |
|---|---|---|---|---|
| Mean age at first SIb (95% CI) | – | 20.9 (20.6–21.2) | 20.5 (20.1–20.8) | 20.7 (20.5–20.9) |
| Percent (%) who ever had SI in their lifetime (95% CI) | 15–19 | 19.7 (11.0–32.8) | 30.1 (16.3–48.8) | 24.0 (15.8–34.7) |
| 20–29 | 61.5 (52.5–69.8) | 83.7 (75.3–89.6) | 72.8 (66.6–78.2) | |
| 30–39 | 91.8 (84.9–95.7) | 97.9 (75.3–89.6) | 94.8 (91.0–97.1) | |
| 40–49 | 96.7 (93.5–98.3) | 97.9 (94.4–99.2) | 97.2 (95.1–98.4) | |
| 50–59 | 95.4 (92.2–97.3) | 99.1 (96.3–99.8) | 97.1 (95.2–98.2) | |
| Over 60 | 97.6 (92.6–99.2) | 98.3 (93.3–99.6) | 97.9 (95.1–99.1) | |
| All | 86.0 (83.6–88.2) | 92.7 (90.5–94.4) | 89.1 (87.5–90.6) | |
| Percent (%) had SI in the past 3 months (95% CI) | 15–19 | 15.0 (7.8–26.7) | 10.7 (4.0–25.7) | 13.2 (7.7–21.7) |
| 20–29 | 45.9 (37.4–54.7) | 55.9 (46.8–64.7) | 51.0 (44.7–57.3) | |
| 30–39 | 77.1 (68.8–83.7) | 75.0 (66.6–81.9) | 76.0 (70.3–81.0) | |
| 40–49 | 79.4 (73.4–84.4) | 82.4 (75.5–87.7) | 80.6 (76.2–84.4) | |
| 50–59 | 63.0 (56.9–68.8) | 82.7 (76.9–87.3) | 72.1 (67.9–76.0) | |
| Over 60 | 39.9 (30.7–49.9) | 65.6 (55.6–74.3) | 52.3 (46.3–60.1) | |
| All | 61.2 (57.9–64.4) | 71.1 (67.7–74.3) | 65.8 (63.5–68.2) | |
| Percent (%) who regularly used condoms in the past 3 monthsa, b (95% CI) | 15–19 | 17.2 (4.0–50.5) | 23.7 (5.6–61.9) | 20.5 (7.4–45.3) |
| 20–29 | 4.8 (2.0–11.3) | 18.5 (11.9–27.5) | 12.8 (8.6–18.7) | |
| 30–39 | 7.0 (3.4–13.8) | 7.1 (3.5–13.6) | 7.1 (4.3–11.3) | |
| 40–49 | 2.1 (0.9–5.0) | 3.5 (1.6–7.7) | 2.7 (1.5–4.8) | |
| 50–59 | 2.2 (0.9–5.4) | 3.4 (1.6–7.1) | 2.8 (1.5–4.9) | |
| Over 60 | No observations | 2.8 (1.0–7.3) | 1.4 (0.5–3.8) | |
| All | 3.1 (2.1–4.7) | 6.6 (4.9–8.7) | 4.8 (3.7–6.1) |
SI sexual intercourse, CI confidence interval
aRegular condom used defined as having used condom most of the time and all of the time in past 3 months
bThe data analyzed amongst those who had experienced SI