Estimated rate ratios derived from Poisson regression model of first episodes of genital Chlamydia trachomatis infection, Coventry residents 1992–96, females
| Age band (y) | Ethnic group | Deprivation level | Episodes | Population 1992–6 | Incidence (per 100 000) | 95% CI | Unadjusted rate ratio | Adjusted rate ratio* | 95% CI |
|---|---|---|---|---|---|---|---|---|---|
| *Adjusted by Poisson regression with white, aged 25–64 and lowest deprivation as baseline. | |||||||||
| Main effects plus term for interaction between age and ethnic group. | |||||||||
| 15–19 | white | low | 46 | 13 415 | 343 | (251–457) | 7.5 | 9.0 | (7.3–11.1) |
| moderate | 56 | 12 560 | 446 | (337–579) | 9.7 | 10.4 | (7.7–14.1) | ||
| high | 79 | 13 010 | 607 | (481–756) | 13.2 | 12.3 | (9.2–16.5) | ||
| black | low | 1 | 180 | 556 | (14–3056) | 12.1 | 28.1 | (15.9–49.4) | |
| moderate | 2 | 220 | 909 | (110–3245) | 19.8 | 32.4 | (17.7–59.2) | ||
| high | 10 | 455 | 2198 | (1060–4005) | 47.8 | 38.3 | (21.3–69.1) | ||
| other | low | 0 | 1 100 | 0 | (0–330) | 0.0 | 0.5 | (0.1–1.9) | |
| moderate | 0 | 2 085 | 0 | (0–180) | 0.0 | 0.6 | (0.1–2.3) | ||
| high | 2 | 4 385 | 46 | (6–165) | 1.0 | 0.7 | (0.2–2.7) | ||
| 20–24 | white | low | 51 | 14 770 | 345 | (257–454) | 7.5 | 7.0 | (5.7–8.6) |
| moderate | 65 | 16 485 | 394 | (298–492) | 8.6 | 8.1 | (6.0–10.8) | ||
| high | 76 | 20 990 | 362 | (285–453) | 7.9 | 9.6 | (7.2–12.7) | ||
| black | low | 0 | 140 | 0 | (0–2600) | 0.0 | 10.5 | (5.1–21.3) | |
| moderate | 3 | 370 | 811 | (168–2351) | 17.6 | 12.1 | (5.8–25.3) | ||
| high | 5 | 860 | 581 | (190–1352) | 12.6 | 14.3 | (6.9–29.5) | ||
| other | low | 4 | 1 110 | 360 | (98–920) | 7.8 | 2.3 | (1.2–4.4) | |
| moderate | 2 | 2 000 | 100 | (12–361) | 2.2 | 2.7 | (1.4–5.2) | ||
| high | 4 | 4 720 | 85 | (23–217) | 1.8 | 3.2 | (1.6–6.1) | ||
| 25–64 | white | low | 52 | 113 145 | 46 | (34–60) | referent | referent | referent |
| moderate | 49 | 109 880 | 45 | (33–59) | 1.0 | 1.2 | (0.9–1.4) | ||
| high | 63 | 98 110 | 64 | (49–82) | 1.4 | 1.4 | (1.1–1.7) | ||
| black | low | 0 | 885 | 0 | (0–420) | 0.0 | 2.6 | (1.3–5.3) | |
| moderate | 2 | 1 870 | 107 | (13–386) | 2.3 | 3.0 | (1.4–6.3) | ||
| high | 6 | 2 875 | 209 | (77–454) | 4.5 | 3.6 | (1.7–7.4) | ||
| other | low | 0 | 5 105 | 0 | (0–70) | 0.0 | 0.2 | (0.1–0.6) | |
| moderate | 4 | 9 900 | 40 | (11–103) | 0.9 | 0.3 | (0.1–0.7) | ||
| high | 0 | 18 790 | 0 | (0–20) | 0.0 | 0.3 | (0.1–0.8) | ||