Table 2.
Receptive anal intercourse (RAI) prevalence and RAI fraction among women by demographic characteristics and past year sexual behaviours, combined NHBS-HET study cycles 2010 and 2013.
| Sexual behaviour in the past year among all women in study population |
Last sexual episode among women who reported RAI in the past year |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RAI prevalence |
RAI women (RAI in the past year) |
Non-RAI women (No RAI in the past year) |
OR | RAI fraction |
RAI acts1 | RVI acts1 | OR | |||
| Characteristics | % (95% CI) |
N (%) | N (%) | (95%CI) | p- value |
% (95%CI ) |
Nacts (%) | Nacts (%) | (95 %CI) | p-value |
| Overall | 31.9 (30.9-32.8) | 2924 (100) | 6228 (100) | NA | 26.7 (25.3-28.1) | 1045 (100) | 2870 (100) | NA | ||
| Demographics | ||||||||||
| Age | <0.001 | 0.050 | ||||||||
| 18-19 | 22.4 (19.4-25.7) | 148 (5.1) | 512 (8.2) | 1.00 | 23.6 (18.1-30.1) | 45 (4.3) | 146 (5.1) | 1 | ||
| 20-24 | 31.7 (29.3-34.0) | 483 (16.5) | 1042 (16.7) | 1.60 (1.30-1.98) | <0.001 | 25.6 (22.3-29.1) | 162 (15.5) | 471 (16.4) | 1.12 (0.76-1.63) | 0.570 |
| 25-29 | 33.0 (30.5-35.6) | 424 (14.5) | 860 (13.8) | 1.71 (1.37-2.12) | <0.001 | 26.1 (22.7-29.9) | 147 (14.1) | 416 (14.5) | 1.14 (0.78-1.68) | 0.485 |
| 30-39 | 36.0 (33.8-38.2) | 676 (23.1) | 1203 (19.3) | 1.94 (1.58-2.39) | <0.001 | 24.0 (21.3-27.0) | 212 (20.3) | 670 (23.3) | 1.03 (0.71-1.48) | 0.889 |
| 40-60 | 31.4 (29.9-32.9) | 1193 (40.8) | 2611 (41.9) | 1.58 (1.30-1.92) | <0.001 | 29.1 (27.0-31.4) | 479 (45.8) | 1166 (40.6) | 1.33 (0.94-1.89) | 0.107 |
| Race/ethnicity | 0.003 | 0.278 | ||||||||
| Black | 31.1 (30.0-32.2) | 2079 (71.1) | 4613 (74.1) | 1.00 | 26.7 (25.1-28.4) | 741 (70.9) | 2034 (70.9) | 1 | ||
| Hispanic | 35.0 (32.8-37.3) | 607 (20.8) | 1127 (18.1) | 1.20 (1.07-1.34) | 0.002 | 27.7 (24.8-30.8) | 231 (22.1) | 603 (21.0) | 1.05 (0.88-1.25) | 0.570 |
| White | 37.2 (31.7-43.1) | 102 (3.5) | 172 (2.8) | 1.32 (1.02-1.69) | 0.033 | 19.4 (13.4-27.2) | 24 (2.3) | 100 (3.5) | 0.66 (0.42-1.04) | 0.069 |
| Other | 30.0 (25.9-34.4) | 133 (4.5) | 311 (5.0) | 0.95 (0.77-1.17) | 0.633 | 27.0 (21.0-33.9) | 48 (4.6) | 130 (4.5) | 1.01 (0.72-1.43) | 0.939 |
| Marital status | 0.187 | 0.665 | ||||||||
| Married/cohabiting | 31.0 (28.7-33.4) | 468 (16.0) | 1042 (16.7) | 1.00 | 26.3 (24.6-28.1) | 648 (62.0) | 1815 (63.2) | 1 | ||
| Never married | 31.7 (30.5-32.9) | 1,845 (63.1) | 3,982 (63.9) | 1.03 (0.91-1.17) | 0.641 | 26.6 (23.3-30.2) | 167 (16.0) | 461 (16.1) | 1.01 (0.83-1.24) | 0.886 |
| Other | 33.7 (31.5-35.9) | 611 (20.9) | 1,204 (19.3) | 1.13 (0.98-1.31) | 0.102 | 27.9 (25.0-31.1) | 230 (22.0) | 594 (20.7) | 1.08 (0.91-1.29) | 0.368 |
| Past year sexual behaviours | Last-sex3 | |||||||||
| Partner type | <0.001 | |||||||||
| Main only | 18.8 (17.6-20.1) | 707 (24.2) | 3054 (49.0) | 1.00 | 24.5 (22.8-26.3) | 577 (55.2) | 1780 (62.0) | 1 | ||
| Main and casual partners | 41.3 (39.8-42.9) | 1628 (55.7) | 2311 (37.1) | 3.04 (2.74-3.37) | NA | NA | NA | NA | ||
| Casual only | 40.6 (38.1-43.1) | 589 (20.1) | 863 (13.9) | 2.95 (2.58-3.37) | 30.0 (27.8-32.4) | 468(44.8) | 1090 (38.0) | 1.32 (1.15-1.53) | <0.001 | |
| Exchange sex2 | <0.001 | 0.001 | ||||||||
| No | 26.0 (25.0-27.0) | 1848 (63.2) | 5264 (84.5) | 1.00 | 24.9 (23.2-26.6) | 601 (57.5) | 1817 (63.3) | 1 | ||
| Yes | 52.7 (50.6-54.9) | 1075 (36.8) | 964 (15.5) | 3.18 (2.87-3.52) | <0.001 | 29.7 (27.4-32.0) | 444 (42.5) | 1052 (36.7) | 1.28 (1.10-1.47) | <0.001 |
All P-values are derived from the chi-squared statistic, 95% confidence interval using the Wilson interval and 95% confidence intervals for odds ratios are estimated using normal approximation (Wald).
NA = not available
Number of acts defined as the sum of anal or vaginal acts reported by RAI women at last their sexual episode
Definition changed across rounds: in 2010 the definition of women exchanging sex included women who had any exchange partners in the last year; in 2013 the definition of women exchanging sex included women who had only casual exchange partners in the last year.
By definition this refers to acts with main or casual sexual partners at last sexual episode.