Prevalence of a valid test result and associated factors
| Characteristic | Valid result, % (n) | p Value |
| Total | 97.0 (193) | |
| Gender and sexual behaviour | 0.682* | |
| Female | 95.0 (18) | |
| Men who have sex with men | 97.0 (95) | |
| Men who have sex exclusively with women | 97.5 (78) | |
| English spoken as first language | 0.180* | |
| No | 100.0 (63) | |
| Yes | 95.6 (130) | |
| Highest qualification | 0.535† | |
| Higher degree | 96.8 (61) | |
| Degree | 98.7 (75) | |
| Further education | 94.6 (35) | |
| Secondary school/none | 95.5 (21) |
*Fisher’s exact test.
†Trend test across ordered groups.