Table 2 Intention-to-treat analysis (460 practices) with adjusted stratification comparing change in chlamydia testing pre- & post-intervention
Practice characteristic & sub-group | Total number of practices | Adjusted incident rate ratio (95Â % confidence interval; P value) |
|---|---|---|
Chlamydia testing rate per practice in 2013 | ||
 Less than England median | 163 | 1.54 (0.99-2.37; 0.051) |
 Greater than England median | 297 | 1.05 (0.69-1.60; 0.823) |
Payment for chlamydia screening | ||
 Yes | 148 | 2.12 (1.41-3.18; <0.001) |
 No | 43 | 1.54 (0.99-2.37; 0.051) |
 Unknown | 269 | 1.77 (1.19-2.65; 0.005) |
Number of GPs employed | Â | Â |
 1 | 12 | 1.54 (0.99-2.37; 0.051) |
 2-5 | 130 | 1.19 (0.94-1.51; 0.156) |
 6-10 | 158 | 1.35 (1.07-1.71; 0.012) |
 11-15 | 108 | 1.37 (1.09-1.73; 0.007) |
 16+ | 52 | 1.27 (0.99-1.61; 0.053) |