Factors associated with correct interpretation of contrived devices
| Correct interpretation % (95% CI) | p Value | |
| Total, n=586 | 94.0 (91.4 to 95.9) | |
| Contrived device result | 0.114 | |
| Non-reactive, n=229 | 93.3 (89.9 to 95.6) | |
| Reactive, n=197 | 92.9 (87.3 to 96.1) | |
| Invalid, n=90 | 98.9 (92.4 to 99.9) | |
| Gender and sexual behaviour | 0.442 | |
| Female, n=53 | 90.6 (77.4 to 96.4) | |
| Men who have sex with men, n=291 | 95.2 (91.6 to 97.3) | |
| Men who have sex exclusively with women, n=236 | 93.2 (88.3 to 96.2) | |
| English spoken as first language | 0.092 | |
| No, n=182 | 91.2 (85.0 to 95.0) | |
| Yes, n=404 | 95.3 (92.4 to 97.1) | |
| Highest qualification | 0.837 | |
| Higher degree, n=186 | 93.0 (86.9 to 96.4) | |
| Degree, n=227 | 93.8 (89.0 to 96.6) | |
| Further education, n=107 | 95.3 (89.6 to 98.0) | |
| Secondary school/none, n=66 | 95.5 (87.4 to 98.5) | |
| Self-reported ethnicity | 0.030 | |
| White, n=419 | 95.2 (92.4 to 97.1) | |
| Black, n=47 | 83.0 (65.7 to 92.6) | |
| Asian, n=27 | 92.6 (76.7 to 97.9) | |
| Other, n=72 | 94.4 (83.5 to 98.3) | |
| Place of birth | 0.072 | |
| Outside UK, n=307 | 92.2 (87.8 to 95.1) | |
| UK, n=279 | 96.1 (92.8 to 97.9) |