Figure 1.

Detrended correspondence analysis (DCA) bi-plot to visualise the relationships between demographic and infection variables (listed in table 1). Axes 1 and 2 are the major axes of variation between individuals based on the inclusion of all measured variables (such that those at opposite ends of an axis are the most different, hence those that are most similar can form identifiable groupings). Arrows along the axes illustrate the significant correlation between distance travelled and the axis score (Axis 1: Spearman's r_s = -0.135, P < 0.001; Axis 2: Spearman's r_s = 0.274, P < 0.001). The individuals are labelled by infection route (Blood = contaminated blood/blood products, Het = heterosexual, IDU = injecting drug use, MSM = men who have sex with men, MTC = mother to child).