Fig. 2.

The age distribution of HCV RNA positivity among 2298 blood samples from the DRC. Samples are assigned to one of four age categories by year of birth. Numbers below each category indicate the number of positive samples/total number of samples. Fifteen samples (all negative) did not have date of birth information and are not included. The y-axis shows the proportion of samples in each age category that were HCV RNA-positive. The errors bars represent 95% confidence limits of this proportion, estimated using the adjusted Wald method (Agresti and Coull, 1998).