Risser Jan M H, Montealegre Jane R
Division of Epidemiology, Human Genetics and Environmental Sciences, University of Texas School of Public Health, Houston, TX, USA,
AIDS Behav. 2014 Apr;18 Suppl 3:382-90. doi: 10.1007/s10461-013-0562-5.
We examined differences in sample demographics across cycles of the National HIV Behavioral Surveillance project, that examines HIV risk behaviors among men who have sex with men (MSM), injection drug users (IDU), and heterosexuals living in areas of high HIV prevalence (HET). MSM were recruited through venue-based sampling, and IDU and HET through respondent driven sampling (RDS). RDS data were weighted to account for sampling bias. We compared crude prevalence estimates from MSM1 (2004) to those from MSM2 (2008) for demographic factors known to influence risky sexual and drug-use behaviors. We compared crude and adjusted prevalence estimates for IDU1 (2005) and IDU2 (2009) and HET1 (2006) and HET2 (2010). In the MSM cycle, we found differences in age, and the proportions seeking medical care and reporting a recent arrest. There were no differences in the comparison of crude and weighted estimates for the RDS collected samples, nor were there differences comparing HET1 and HET2 weighted estimates. IDU2 recruited a larger proportion of males, and had a higher percent who graduated from high school and who reported recent medical care and a previous HIV test. Differences across MSM cycles may be related to differences in venues identified for each cycle. Differences in the IDU cycles may be due to an effort on our part to increase the racial/ethnic and drug-use diversity of the sample in IDU2. Our findings show the importance of formative work for both venue-based and RDS samples to increase understanding of the dimensions that affect social networks and the dynamics of populations in space and time. With familiarity of the target population, we believe that both venue-based and RDS recruitment approaches for NHBS work well and can be used to evaluate changes in risky sexual and drug use behaviors and in HIV testing behaviors.
我们研究了国家艾滋病行为监测项目各周期样本人口统计学特征的差异，该项目调查男男性行为者（MSM）、注射吸毒者（IDU）以及生活在艾滋病高流行地区的异性恋者（HET）的艾滋病风险行为。MSM通过场所抽样招募，IDU和HET通过应答者驱动抽样（RDS）招募。对RDS数据进行加权以校正抽样偏差。我们比较了MSM1（2004年）和MSM2（2008年）中已知会影响危险性性行为和吸毒行为的人口统计学因素的粗患病率估计值。我们还比较了IDU1（2005年）和IDU2（2009年）以及HET1（2006年）和HET2（2010年）的粗患病率估计值和校正患病率估计值。在MSM周期中，我们发现了年龄差异，以及寻求医疗护理和报告近期被捕情况的比例差异。RDS收集样本的粗估计值和加权估计值比较中没有差异，HET1和HET2加权估计值比较也没有差异。IDU2招募的男性比例更高，高中毕业、报告近期接受医疗护理以及之前接受过艾滋病检测的比例也更高。MSM各周期的差异可能与每个周期确定的场所差异有关。IDU周期的差异可能是由于我们努力增加IDU2样本中的种族/族裔和吸毒多样性。我们的研究结果表明，对于基于场所的样本和RDS样本，开展形成性工作对于增进对影响社会网络的维度以及人群在空间和时间上动态变化的理解非常重要。随着对目标人群的熟悉，我们认为NHBS基于场所的招募方法和RDS招募方法都很有效，可用于评估危险性性行为、吸毒行为以及艾滋病检测行为的变化。
