Abstract
This study aimed to evaluate the risk of HIV infection in men who have sex with men (MSM) by developing an index that considers sex partner networks. The index variables were age, ethnicity/skin color, schooling, relationship type, condom use in receptive and insertive relationships, self-perception of the possibility of HIV infection, sexually transmitted infections, and rapid HIV testing results. We used data from a cross-sectional MSM egocentric network survey conducted in Rio de Janeiro between 2014 and 2015. The initial research volunteer is called ego, each partner is called alter, and each pair of people in a relationship is called the dyad. Multiple logistic regression was used to define the coefficients of the equations for the elaboration of the indices. The index ranged from 0 to 1; the closer to 1, the higher the risk of HIV infection. HIV prevalence was 13.9% among egos. The mean egos index with an HIV-reactive test was 57% higher than non-reactive, and the same profile was observed in the index values of dyads. The index allowed the incorporation of network data through the dyads and contributed to the identification of individuals with a higher likelihood of acquiring HIV.
Highlights
Resumo O objetivo do estudo foi avaliar o risco de infecção por HIV em homens que fazem sexo com homens (HSH) a partir do desenvolvimento de um índice que considere as redes de parceiros sexuais
This study aimed to evaluate the risk of HIV infection in men who have sex with men (MSM) by developing an index that considers sex partner networks
We used data from a cross-sectional MSM egocentric network survey conducted in Rio de Janeiro between 2014 and 2015
Summary
Os participantes elegíveis para a pesquisa foram os homens com idade igual ou superior a 18 anos que tenham relatado relações sexuais com homens nos últimos seis meses. O voluntário inicial da pesquisa foi denominado ego, e cada integrante de sua rede de relacionamento, fosse sexual ou de amizade, foram denominados alters. O mesmo foi realizado para a rede social de amizade, em que o voluntário listou até cinco pessoas com que ele teve amizade nos últimos seis meses e então respondeu a outro questionário específico para cada amigo listado. Os dados sobre rede social de amizade e a matriz de relação entre os parceiros sexuais e amigos não foram utilizados neste estudo. A partir dos quatro questionários, foram gerados quatro bancos de dados, dos quais neste estudo foram utilizados somente dois, referentes aos seguintes questionários: 1) dados do ego com questões sobre si próprios e 2) dados de cada parceiro sexual de sua rede
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