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. 2013 Aug 22;7(8):e2389. doi: 10.1371/journal.pntd.0002389

Figure 1. Histogram of the district variance of TF in Kenya (A) and density functions used to simulate data (B).

Figure 1

Variance in the prevalence of active trachoma was quantified within 29 districts in Kenya. The mean within-district variance was then used to inform beta density functions for simulating cluster-level prevalence values for varying district level prevalence values.