Background ACCEPt is a cluster randomised controlled trial to evaluate annual opportunistic chlamydia screening for 16–29-year-old men and women in general practice (GP).
Objective To report enrolment and baseline results.
Methods The unit of randomisation is a town; all GP clinics are enrolled and towns are randomised using a minimisation design. In intervention towns a multifaceted approach to increase chlamydia testing includes: an education package, a computer prompt; incentive payments; a recall system for annual testing; partner notification; and regular feedback on testing rates. The intervention will be in place for up to 4 years. Control towns will continue usual practice. The primary outcome is change in chlamydia prevalence estimated from samples of 80–100 consecutive GP patients in each town (total 4000) at the beginning and end of the trial.
Results From July 2010 to December 2011, we enrolled 603 GPs from 154 clinics (clinic response rate >80%) in 52 geographically diverse towns in four Australian states (total population 72 000 16–29-year-olds). To date, 27 towns have been randomised (13 intervention, 14 control). Intervention and control towns are similar: baseline chlamydia prevalence (5.8%, 95% CI 4.4 to 7.5% vs 5%, 95% CI 3.9 to 6.3%, individual response rate 63%); past chlamydia testing rate in 16–29-year-olds (6.1%, 95% CI 5.8 to 6.4% vs 5.8%, 5.6 to 6%). After 3 months of the intervention in the first two towns the chlamydia testing rate was 10.9% (95% CI 10.1% to 11.7%; 691 people tested), a 160% increase compared with the testing rate (4.1%) in the year before the intervention.
Conclusions Our high recruitment rate shows that Australian GPs are willing to test for chlamydia. The baseline data show a high prevalence of chlamydia among young adults in the study towns. While testing rates are increasing, ongoing work is needed to get coverage up to levels that might reduce prevalence in intervention towns.