Figure 6From: Evaluation design of a systematic, selective, internet-based, Chlamydiascreening implementation in the Netherlands, 2008-2010: implications of first results for the analysis Participation rates (bars) and positivity rates (lines) in year 1 of the Chlamydia screening per region and for the three community risk levels estimated on the basis of demographic characteristics. Error bars show 95% confidence intervals; H = high, M = medium, L = low.Back to article page