Assessment of non-response bias in a probability household survey of male same-gender sexual behavior

José Antonio Izazola-Licea, Steven L. Gortmaker, Victor De Gruttola, Kathryn Tolbert, Jonathan Mann
2000 Salud Pública de México  
Assessment of non-response bias in a probability household survey of male same-gender sexual behavior. Salud Publica Mex 2000;42:90-98. Abstract Objective. To assess non-participation bias in a survey of male sexual behavior. Material and methods. A household survey was carried out in 1992-1993 using a probability sampling frame in Mexico City. Demographic variables were available for all eligible men. The extent of non-participation bias was estimated using a version of the Heckman method,
more » ... Heckman method, which utilizes two equations, one to predict participation and the other to predict reports of same-gender sexual behavior. Results. A total of 8 068 of the 13 713 eligible men completed a face-to-face questionnaire (response rate 59%); 173 men (2.1%) reported bisexual behavior in their lifetime, and 37 (0.4%) reported only male partners. Survey participation was predicted using demographic variables: 67% of the observations were correctly predicted by a probit regression model: 82% of participants and 53% of non-participants (pseudo-r 2 =0.13). Same-gender sexual behavior was predicted by variables indicating attachment to gay/bisexual social networks, history of sexually transmitted diseases, positive attitudes towards gay and bisexual males, and lack of support from male relatives. Ninety-seven per cent of the cases was correctly predicted by the probit model (pseudo-r 2 =0.14). The correlation between these two equations was not statistically significant. Conclusions. These results indicate that prevalence esti- Izazola-Licea JA, Gortmaker SL, De Gruttola V, Tolbert K, Mann J. Determinación de sesgo de no respuesta en una encuesta probabilística de hogares de comportamiento sexual con personas del mismo género. Salud Publica Mex 2000;42:90-98. 91 salud pública de méxico / vol.42, no.2, marzo-abril de 2000 Assessment of non-response bias in a probability household survey ARTÍCULO ORIGINAL
doi:10.1590/s0036-36342000000200003 fatcat:g6d7jx3dmva4nmi4w3myis3lfa