Strong association between point-concurrency and national peak HIV prevalence

摘要

Attempts at evaluating the ecological association between concurrency and HIV prevalence have been stymied by wide variations in how concurrency is defined and measured in different studies. In response to this problem, the UNAIDS Reference Group on Estimates Modelling and Projections has published recommendations on how concurrency should be defined and measured.1 The recommendations stipulate that the point-prevalence of concurrency should be the key indicator of concurrency. Recent studies have corroborated the utility of this measure.