Fig. 1

Alluvial diagram of PrEP use over time, N = 173

PrEP use in the preceding three months: daily: ≥ 90 pills; almost daily: 75–89 pills; long period use with or without additional short period use: using PrEP in episodes of more than 7 days in a row and less than 75 pills in total, with or without additional short period use; short period use only: taking PrEP in episodes of 1 up to 7 consecutive days and less than 75 pills; None: zero pills

* The p-value between brackets represents the p-value of the Chi-squared test with Rao and Scott adjustment. This test assessed whether the proportion of each PrEP use category differed significantly over time when compared to all other PrEP use categories combined