Tests from individuals under 25 screened in the South East between March 2006 to April 2007 by demographic and geographic variables and sex
| Characteristics | Males | Females |
| No of tests (percentage of total) | No of tests (percentage of total) | |
| Total | ||
| 6467 | 19675 | |
| Age group | ||
| <16 | 323 (5.0) | 1951 (9.9) |
| 16–19 | 3747 (57.9) | 10320 (52.5) |
| 20–24 | 2397 (37.1) | 7404 (37.6) |
| Ethnicity | ||
| White | 5169 (79.9) | 16558 (84.2) |
| Black | 248 (3.8) | 418 (2.1) |
| Asian | 50 (0.8) | 147 (0.7) |
| Chinese | 58 (0.9) | 109 (0.6) |
| Other ethnic group | 62 (1.0) | 96 (0.5) |
| Mixed | 145 (2.2) | 395 (2.0) |
| Unknown | 735 (11.4) | 1952 (9.9) |
| Result | ||
| Positive | 480 (7.4) | 1727 (8.8) |
| Negative | 5829 (90.1) | 17376 (88.3) |
| Insufficient specimen | 122 (1.9) | 239 (1.2) |
| Other | 36 (0.6) | 333 (1.7) |
| Postcode | ||
| South East non-clinic postcode | 3720 (57.5%) | 16246 (82.6%) |
| Screen with clinic postcode | 1816 (28.1%) | 756 (3.8%) |
| Non-South East postcode | 184 (2.8%) | 255 (1.3%) |
| Unmappable postcodes | 747 (11.6%) | 2418 (12.3%) |
| Clinic type | ||
| Accident and emergency | 10 (0.2) | 19 (0.1) |
| Chlamydia screening office | 267 (4.1) | 260 (1.3) |
| Community contraception services | 703 (10.9) | 6871 (34.9) |
| General practice | 875 (13.5) | 3423 (17.4) |
| Gynaecology and obstetrics | 4 (0.1) | 540 (2.7) |
| Military | 1200 (18.6) | 257 (1.3) |
| Outreach | 162 (2.5) | 342 (1.7) |
| Pharmacy | 39 (0.6) | 139 (0.7) |
| Postal kit | 214 (3.3) | 695 (3.5) |
| Prison | 165 (2.6) | 24 (0.1) |
| Sexual-health services | 35 (0.5) | 67 (0.3) |
| Termination of pregnancy | 2 (0.0) | 584 (3.0) |
| University | 1752 (27.1) | 2136 (10.9) |
| Youth services | 1039 (16.1) | 4318 (21.9) |
| Setting | ||
| Healthcare | 1833 (28.3) | 11667 (59.3) |
| Non-healthcare | 4634 (71.7) | 8008 (40.7) |
| Urban/rural* | ||
| Urban | 4513 (81.5) | 15016 (88.3) |
| Rural | 1023 (18.5) | 1986 (11.7) |
| South East Indices of Multiple Deprivation categories* | ||
| 1 (most deprived) | 1242 (22.4) | 6148 (36.2) |
| 2 | 960 (17.3) | 3812 (22.4) |
| 3 | 912 (16.5) | 2688 (15.8) |
| 4 | 1200 (21.7) | 2244 (13.2) |
| 5 | 1222 (22.1) | 2110 (12.4) |
Four tests were removed because sex was either blank or incorrectly coded.
↵* Require mappable postcode, South East screens only.