Figure 5From: Evaluation design of a systematic, selective, internet-based, Chlamydiascreening implementation in the Netherlands, 2008-2010: implications of first results for the analysis Participation rates (A) and positivity rates (B) in year 1 of the Chlamydia screening, per region and for blocks A and B of the stepped wedge design. Error bars show 95% confidence intervals.Back to article page