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Address correspondence to this author at Emory University, Rollins School of Public Health, Department of Epidemiology, 1518 Clifton Road NE, Atlanta, GA 30322, USA; Tel: +1 404 727-8750; Fax: +1 404 712-8392; E-mail: a.d.mcnaghten@emory.edu

The authors confirm that this article content has no conflicts of interest.


A Probability Sample for Monitoring the HIV-infected Population in Care in the U.S. and in Selected States


Journal Title:

Open AIDS Journal


Volume 2012, Number 6


, Pages 67-76

Type of Work:

Article | Final Publisher PDF


Epidemiologic and clinical changes in the HIV epidemic over time have presented a challenge to public health surveillance to monitor behavioral and clinical factors that affect disease progression and HIV transmission. The Medical Monitoring Project (MMP) is a supplemental surveillance project designed to provide representative, population-based data on clinical status, care, outcomes, and behaviors of HIV-infected persons receiving care at the national level. We describe a three-stage probability sampling method that provides both nationally and state-level representative estimates. In stage-I, 20 states, which included 6 separately funded cities/counties, were selected using probability proportional to size (PPS) sampling. PPS sampling was also used in stage-II to select facilities for participation in each of the 26 funded areas. In stage-III, patients were randomly selected from sampled facilities in a manner that maximized the possibility of having overall equal selection probabilities for every patient in the state or city/county. The sampling methods for MMP could be adapted to other research projects at national or sub-national levels to monitor populations of interest or evaluate outcomes and care for a range of specific diseases or conditions.

Copyright information:

© Frankel et al.; Licensee Bentham Open.

This is an Open Access work distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/).

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