Proportion of 17–24-year-olds reporting certain circumstances at first sex by age at first sex
| Age at first sex (years) | Not equally willing | Not the ’right time' | Non-autonomous reason | Did not use reliable contraception | Not ’sexually competent' | N (unweighted/ weighted)* |
| % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | ||
| Women | ||||||
| 13–14 | 28.4 (22.7 to 34.9) | 71.6 (65.2 to 77.2) | 28.8 (23.2 to 35.0) | 17.4 (13.0 to 22.8) | 77.7 (71.5 to 82.9) | 249/119 |
| 15 | 16.0 (12.4 to 20.4) | 53.8 (48.1 to 59.5) | 23.6 (19.0 to 28.8) | 10.2 (7.4 to 13.9) | 61.5 (55.7 to 66.9) | 352/185 |
| 16 | 15.7 (12.1 to 20.7) | 30.8 (26.2 to 35.8) | 13.9 (10.8 to 17.8) | 6.8 (4.8 to 9.5) | 44.9 (39.8 to 50.0) | 473/260 |
| 17 | 17.9 (12.4 to 25.0) | 31.4 (25.2 to 38.4) | 14.3 (10.2 to 19.6) | 10.9 (7.2 to 16.2) | 47.6 (40.7 to 54.6) | 262/152 |
| 18–24 | 13.4 (9.0 to 19.4) | 22.1 (16.3 to 29.3) | 7.7 (4.4 to 13.1) | 11.3 (7.5 to 16.7) | 36.3 (29.3 to 44.0) | 227/163 |
| P value† | 0.009 | <0.001 | <0.001 | 0.234 | <0.001 | |
| All | 17.4 (15.4 to 19.7) | 39.7 (37.0 to 42.4) | 17.0 (15.1 to 19.1) | 10.5 (8.9 to 12.3) | 51.7 (48.9 to 54.5) | |
| N (unweighted/ weighted) | 1567/880 | 1562/877 | 1543/865 | 1566/880 | 1563/878 | |
| Men | ||||||
| 13–14 | 16.6 (11.1 to 24.1) | 49.0 (41.4 to 56.6) | 14.6 (9.5 to 21.6) | 25.0 (19.2 to 31.9) | 64.7 (57.3 to 71.5) | 210/148 |
| 15 | 8.0 (5.0 to 12.4) | 29.6 (23.8 to 36.0) | 15.3 (11.4 to 20.4) | 10.9 (7.4 to 15.8) | 47.3 (40.7 to 53.9) | 262/186 |
| 16 | 6.7 (4.1 to 10.8) | 20.1 (15.1 to 26.2) | 11.4 (8.0 to 16.1) | 5.7 (3.5 to 8.9) | 34.3 (28.5 to 40.6) | 318/234 |
| 17 | 13.1 (7.6 to 21.6) | 15.6 (10.7 to 22.2) | 7.9 (4.7 to 12.8) | 9.5 (6.1 to 14.5) | 38.0 (30.7 to 46.0) | 214/160 |
| 18–24 | 7.4 (4.6 to 11.6) | 23.0 (16.8 to 30.6) | 12.4 (8.3 to 18.1) | 12.8 (8.6 to 18.6) | 39.6 (32.3 to 47.3) | 217/180 |
| P value† | 0.133 | <0.001 | 0.161 | 0.014 | <0.001 | |
| All | 9.8 (7.9 to 12.2) | 26.5 (23.8 to 29.5) | 12.3 (10.3 to 14.6) | 12.0 (10.2 to 14.1) | 43.6 (40.4 to 46.9) | |
| N (unweighted/ weighted)‡ | 1226/912 | 1218/906 | 1221/908 | 1225/911 | 1221/908 | |
*Values of n displayed are the denominators used for calculating the proportions not ‘sexually competent’. Denominators for other components vary slightly due to non-response to individual items.
†P value for test for trend.
‡Denominator for ‘sexual competence’ exceeds that of some components: respondents with missing data on any of the components were classified as not sexually competent if any of the non-missing values indicated unequal willingness, not the right time, non-autonomous reason, or non-use of reliable contraception.