| Behaviours | Men | All | Women | All | ||||
| Age in years (birth cohort) | Age in years (birth cohort) | |||||||
| 18–24 (1975–82) | 25–34 (1965–74) | 35–49 (1950–64) | 18–24 (1975–82) | 25–34 (1965–74) | 35–49 (1950–64) | |||
| Heterosexual practices ever (95% CI) | ||||||||
| Vaginal intercourse | 84.2% | 97.1% | 99.1% | 95.2% | 85.0% | 99.1% | 99.8% | 96.3% |
| 79.9–87.8 | 93.6–98.7 | 97.2–99.7 | 93.7–96.3 | 80.7–88.4 | 96.2–99.8 | 98.3–100 | 95.2–97.2 | |
| Bases WT (UWT) | 192 (321) | 257 (192) | 408 (312) | 857 (825) | 183 (317) | 256 (215) | 403 (348) | 842 (880) |
| Oral sex* | 71.6% | 88.1% | 85.9% | 83.3% | 74.3% | 91.0% | 76.2% | 80.2% |
| 66.4–76.4 | 82.6–92.1 | 81.4–89.5 | 80.4–85.8 | 69.3–78.8 | 86.1–94.3 | 71.2–80.5 | 77.2–82.9 | |
| Bases WT (UWT) | 191 (319) | 250 (187) | 388 (297) | 829 (803) | 181 (314) | 251 (210) | 397 (343) | 829 (867) |
| Anal intercourse | 25.2% | 42.4% | 27.9% | 31.6% | 19.6% | 30.6% | 18.3% | 22.3% |
| 20.3–30.9 | 35.1–50.0 | 22.9–33.5 | 27.9–35.6 | 15.6–24.4 | 24.7–37.2 | 14.6–22.6 | 19.6–25.4 | |
| Bases WT (UWT) | 191 (319) | 246 (184) | 383 (294) | 821 (797) | 180 (312) | 254 (213) | 392 (339) | 826 (864) |
| Non-penetrative sex† | 75.0% | 85.2% | 73.2% | 77.3% | 69.8% | 77.2% | 63.4% | 69.0% |
| 70.0–79.5 | 79.1–89.7 | 67.7–78.0 | 74.0–80.2 | 64.3–74.7 | 70.9–82.4 | 57.5–68.9 | 65.4–72.4 | |
| Bases WT (UWT) | 193 (323) | 253 (189) | 386 (296) | 832 (808) | 183 (317) | 250 (210) | 395 (341) | 828 (868) |
| Heterosexual practices past year (95% CI) | ||||||||
| Vaginal intercourse | 77.4% | 90.5% | 96.0% | 90.2% | 79.3% | 95.1% | 93.6% | 91.0% |
| 72.4–81.8 | 85.5–93.8 | 92.6–97.8 | 88.0–92.0 | 74.4–83.4 | 90.8–97.5 | 90.2–95.9 | 88.8–92.7 | |
| Bases WT (UWT) | 192 (321) | 257 (192) | 408 (312) | 857 (825) | 183 (314) | 251 (210) | 497 (343) | 829 (880) |
| Oral sex* | 62.9% | 82.1% | 76.9% | 75.3% | 68.4% | 81.5% | 63.4% | 70.0% |
| 57.2–68.3 | 76.0–86.9 | 71.5–81.6 | 71.9–78.3 | 63.1–73.2 | 75.5–86.3 | 58.4–68.2 | 66.7–73.1 | |
| Bases WT (UWT) | 191 (319) | 250 (187) | 388 (297) | 829 (803) | 181 (314) | 251 (210) | 397 (343) | 829 (867) |
| Anal intercourse | 18.1% | 24.7% | 16.2% | 19.2% | 14.6% | 16.7% | 10.9% | 13.5% |
| 14.0–23.0 | 18.7–31.9 | 12.2–21.3 | 16.2–22.7 | 11.2–18.9 | 12.4–22.0 | 8.1–14.7 | 11.3–16.0 | |
| Bases WT (UWT) | 191 (319) | 246 (184) | 383 (294) | 821 (797) | 180 (312) | 254 (213) | 392 (339) | 826 (864) |
| Non-penetrative sex† | 63.8% | 73.1% | 58.5% | 64.2% | 63.1% | 61.2% | 46.0% | 54.4% |
| 58.1–69.2 | 66.3–78.9 | 52.5–64.2 | 60.6–67.6 | 57.5–68.3 | 54.2–67.8 | 40.5–51.6 | 50.9–57.9 | |
| Bases WT (UWT) | 193 (323) | 253 (189) | 386 (296) | 832 (808) | 183 (317) | 250 (210) | 395 (341) | 828 (868) |
SLAHS, Sexual Lifestyles, Attitudes and Health Survey; UWT, unweighted counts of individuals; WT, weighted counts of individuals. *Either cunnilingus or fellatio. †Genital contact only and no intercourse (penetrative sex). Numbers of individuals (bases) included in analyses vary according to the number of missing values for individual variables.