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Table 2 Intention-to-treat analysis (460 practices) with adjusted stratification comparing change in chlamydia testing pre- & post-intervention

From: Service evaluation of an educational intervention to improve sexual health services in primary care implemented using a step-wedge design: analysis of chlamydia testing and diagnosis rate changes

Practice characteristic & sub-group Total number of practices Adjusted incident rate ratio (95 % 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   
 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)