Comparison of respondent driven sampling estimators to determine HIV prevalence and population characteristics among men who have sex with men in Moscow, Russia

Andrea L. Wirtz, Shruti H. Mehta, Carl Latkin, Carla E. Zelaya, Noya Galai, Alena Peryshkina, Vladimir Mogilnyi, Petr Dzhigun, Irina Kostetskaya, Chris Beyrer

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Analytically distinct estimators have been proposed for the calculation of population-based estimates derived from respondent-driven sampling (RDS), yet there have been few comparisons of the inferences from these estimators using empirical data. We compared estimates produced by unweighted analysis used to calculate sample proportions and by three available estimators that are used to calculate population proportions, RDS-I, RDS-II (Volz-Heckathorn), and Gile's RDS-SS. Data were derived from a cross-sectional, RDS study of men who have sex with men (MSM) conducted from October 2010 to April 2013 in Moscow, Russia (N = 1,376, recruitment depth: 31 waves). Analyses investigated the influence of key parameters: recruitment depth, homophily, and network size on sample and population estimates. Variability in results produced by the estimators and recruitment depth were statistically compared using the coefficient of variation (CV). Sample proportions had the least variability across different recruitment depths, compared to the RDS estimators. Population estimates tended to differ at lower recruitment depth but were approximately equal after reaching sampling equilibrium, highlighting the importance of sampling to greater recruitment depth. All estimators incorporate inverse probability weighting using self-reported network size, explaining the similarities in across population estimates and the difference of these estimates relative to sample proportions. Current biases and limitations associated with RDS estimators are discussed.

Original languageEnglish
Article numbere0155519
JournalPLoS ONE
Volume11
Issue number6
DOIs
StatePublished - 1 Jun 2016
Externally publishedYes

ASJC Scopus subject areas

  • General

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