Characteristics of sources and demographic weighting
infection
INFECTION
For each directed pair, we characterised the source partner by sex, age group (in 5-year bands), viral drug resistance mutations, and whether they were registered in a different community from their recipient. Sampling bias is an important consideration in a source attribution study. We observed that the study could be viewed as a survey in which recipients of infection provided information about their sources. Thus, methods for adjusting for unrepresentative sampling from survey methodology are appropriate, and we used iterative proportional fitting (“raking”) as implemented in the R 