Sample sizes, response rates, and prevalence of C trachomatis by recruitment method
| Recruitment method | Number of centres | Response rate (%) (estimated) | No | C trachomatis positive | C trachomatis prevalence | 95% CI |
|---|---|---|---|---|---|---|
| †GP surgeries varied in their completeness of collection of refusal data; response rates are therefore best estimates. | ||||||
| Clinic: | ||||||
| Occupational health by invitation | 1 | 25 | 81 | 1 | 1.2% | 0.03–6.69 |
| Occupational health | 5 | 75 | 172 | 6 | 3.5% | 1.28–7.59 |
| General practices | 9 | (60)† | 232 | 2 | 0.9% | 0.10–3.11 |
| University student health services | 2 | 85 | 78 | 0 | 0.0% | 0.00–4.62 |
| “Well man” clinic | 1 | 75 | 23 | 1 | 4.3% | 0.11–21.95 |
| Total | 18 | 55 | 586 | 10 | 1.7% | 0.82–3.14 |
| Postal: | ||||||
| Low deprivation GP | 2 | 44 | 192 | 8 | 4.2% | 1.80–8.21 |
| High deprivation GP | 2 | 46 | 224 | 1 | 0.4% | 0.01–2.49 |
| Total | 4 | 45 | 416 | 9 | 2.2% | 0.99–4.11 |
| Grand total | 22 | 51 | 1002 | 19 | 1.9% | 1.14–2.96 |