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Table 2 Sexual history by age group

From: Sexual health, risky sexual behavior and condom use among adolescents young adults and older adults in Chiang Mai, Thailand: findings from a population based survey

  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)
  1. SI sexual intercourse, CI confidence interval
  2. aRegular condom used defined as having used condom most of the time and all of the time in past 3 months
  3. bThe data analyzed amongst those who had experienced SI