Testing and positivity by demographic characteristics
| Characteristic | Males | Females | ||||||
| Tests | N (% positive) | Crude OR (95% CI) | Adjusted ORs (95% CI) | Tests | N (% positive) | Crude OR (95% CI) | Adjusted ORs (95% CI) | |
| Total | ||||||||
| 6465 | 480 (7.4) | 19670 | 1727 (8.8) | |||||
| Age group | ||||||||
| <16 | 323 | 2 (0.6) | 0.33 (0.18 to 0.59) | 0.21 (0.10 to 0.44) | 1951 | 21 (1.1) | 0.56 (0.45 to 0.69) | 0.46 (0.36 to 0.60) |
| 16–19 | 3746 | 186 (5.0) | 0.53 (0.45 to 0.64) | 0.62 (0.49 to 0.79) | 10317 | 854 (8.3) | 1.05 (0.95 to 1.17) | 1.04 (0.92 to 1.17) |
| 20–24 | 2396 | 205 (8.6) | 1 | 1 | 7402 | 563 (7.6) | 1 | 1 |
| Ethnicity | ||||||||
| White | 5167 | 379 (7.3) | 1 | 1 | 16554 | 1530 (9.2) | 1 | 1 |
| Black | 248 | 35 (14.1) | 2.08 (1.43 to 3.01) | 2.15 (1.40 to 3.29) | 418 | 40 (9.6) | 1.04 (0.75 to 1.45) | 1.01 (0.69 to 1.50) |
| Asian | 50 | 3 (6.0) | 0.81 (0.25 to 2.60) | 0.63 (0.19 to 2.09) | 147 | 6 (4.1) | 0.42 (0.18 to 0.95) | 0.26 (0.08 to 0.82) |
| All other | 207 | 16 (7.7) | 1.06 (0.63 to 1.78) | 0.67 (0.34 to 1.35) | 491 | 43 (8.8) | 0.94 (0.69 to 1.29) | 1.00 (0.71 to 1.42) |
| Urban versus rural | ||||||||
| Urban | 4549 | 334 (7.3) | 1 | 1 | 15001 | 1323 (8.8) | 1 | 1 |
| Rural | 985 | 64 (6.5) | 0.88 (0.66 to 1.16) | 1.16 (0.84 to 1.61) | 1997 | 146 (7.3) | 0.81 (0.68 to 0.97) | 0.84 (0.69 to 1.02) |
| Indices of Multiple Deprivation category | ||||||||
| 1 (most deprived) | 1241 | 119 (9.6) | 1 | 1 | 6148 | 562 (9.1) | 1 | 1 |
| 2 | 960 | 95 (9.9) | 1.04 (0.78 to 1.38) | 1.06 (0.77 to 1.47) | 3812 | 302 (7.9) | 0.86 (0.74 to 0.99) | 0.85 (0.73 to 1.00) |
| 3 | 912 | 69 (7.6) | 0.77 (0.57 to 1.05) | 0.93 (0.65 to 1.33) | 2688 | 264 (9.8) | 1.08 (0.93 to 1.26) | 1.09 (0.92 to 1.28) |
| 4 | 1199 | 57 (4.8) | 0.47 (0.34 to 0.65) | 0.57 (0.38 to 0.85) | 2244 | 194 (8.6) | 0.94 (0.79 to 1.12) | 0.93 (0.77 to 1.11) |
| 5 | 1222 | 58 (4.7) | 0.47 (0.34 to 0.65) | 0.63 (0.43 to 0.92) | 2106 | 147 (7.0) | 0.75 (0.62 to 0.90) | 0.84 (0.69 to 1.03) |
| Clinic type | ||||||||
| General Practice | 874 | 82 (9.4) | 1 | 1 | 3421 | 279 (8.2) | 1 | 1 |
| Community contraceptive clinics | 703 | 89 (12.7) | 1.40 (1.02 to 1.92) | 1.70 (1.17 to 2.48) | 6871 | 673 (9.8) | 1.22 (1.06 to 1.42) | 1.27 (1.08 to 1.49) |
| Prison | 165 | 21 (12.7) | 1.41 (0.84 to 2.35) | 1.26 (0.67 to 2.37) | 24 | 0 (0) | ||
| Youth services | 1038 | 105 (10.1) | 1.09 (0.80 to 1.47) | 1.24 (0.84 to 1.83) | 4317 | 450 (10.4) | 1.31 (1.12 to 1.53) | 1.21 (1.00 to 1.46) |
| Military | 1200 | 63 (5.3) | 0.54 (0.38 to 0.75) | 0.57 (0.37 to 0.88) | 257 | 20 (7.8) | 0.95 (0.59 to 1.52) | 0.88 (0.48 to 1.62) |
| University | 1752 | 52 (3.0) | 0.30 (0.21 to 0.42) | 0.33 (0.22 to 0.51) | 2135 | 92 (4.3) | 0.51 (0.40 to 0.65) | 0.52 (0.40 to 0.68) |
| Other healthcare clinics | 90 | 19 (21.1) | 2.58 (1.48 to 4.50) | 2.43 (1.19 to 4.95) | 1348 | 98 (7.3) | 0.88 (0.70 to 1.12) | 0.88 (0.68 to 1.15) |
| Other non-healthcare clinics | 643 | 49 (7.6) | 0.80 (0.55 to 1.15) | 0.90 (0.58 to 1.42) | 1297 | 115 (8.9) | 1.10 (0.87 to 1.38) | 1.21 (0.95 to 1.56) |
| Setting | ||||||||
| Healthcare | 1832 | 211 (11.5) | 1 | 11664 | 1050 (9.0) | 1 | ||
| Non-healthcare | 4633 | 269 (5.8) | 0.47 (0.39 to 0.57) | 8006 | 677 (8.5) | 0.93 (0.84 to 1.03) | ||
Seven tests have been removed from this analysis, as the screening test result was either blank or incorrectly coded.