Demographic data of patients with chlamydia and gonorrhoea resident within Birmingham Health Authority and attending GUM clinics in and around Birmingham. Controls were patients attending for infection testing at GUM clinics during the same period without an STI
| Control (%) | Chlamydia (%) | Gonorrhoea (%) | |
|---|---|---|---|
| Number | 727 | 665 | 584 |
| Age (range): | |||
| <20 | 60 (8.3) | 138 (20.8) | 132 (22.6) |
| 20–29 | 364 (50) | 362 (54.4) | 298 (51.0) |
| 30–39 | 199 (27.4) | 144 (21.6) | 131 (22.5) |
| >40 | 104 (14.3) | 21 (3.2) | 23 (3.9) |
| Sex (% male) | 48.6 | 63.2 | 58.7 |
| Ethnicity: | |||
| White | 447 (61.5) | 273 (41.2) | 164 (28.1) |
| Black | 208 (28.6) | 325 (49.0) | 384 (65.8) |
| Asian | 70 (9.6) | 30 (4.5) | 13 (2.2) |
| Other | 2 (0.3) | 35 (5.3) | 23 (3.9) |