San Francisco Department of Public Health, San Francisco, CA 94102, USA.
Sex Transm Dis. 2013 Sep;40(9):689-94. doi: 10.1097/01.olq.0000431354.96087.50.
Our goal was to examine whether community-based behavioral surveys can augment data collected for the National HIV Behavioral Surveillance System (NHBS) among men who have sex with men (MSM) in San Francisco.
We compared estimates of sexual risk behaviors among MSM using data from two cycles of NHBS (2004 and 2008) and outreach surveys conducted by STOP AIDS Project (SAP) during the same years. We compared estimates of unprotected anal intercourse (UAI) and other indicators to assess concordance of estimates across methodologies.
Of the 3248 interviews conducted, the NHBS sample included more nonwhite and older MSM, more self-reported HIV positive, and less sexually active men than the SAP sample. Estimates of UAI in the last 6 months were slightly higher in the NHBS survey than in the SAP surveys (2004: 40% vs. 36%, P = 0.03; 2008: 44% vs. 38%, P = 0.08). In 2008, where respondent-partner HIV-discordant status could be measured, estimates of UAI with a potentially discordant partner were similar (12% vs. 12%, P = 0.87). Also, the NHBS and SAP surveys observed similar estimates of UAI by high-risk positioning with potentially discordant partners (HIV-positive men reporting insertive UAI with a potentially HIV-negative partner: 13% vs. 11%, P = 0.45; HIV-negative men reporting receptive UAI with a potentially HIV-positive person: 5% vs. 4%, P = 0.85).
Behavioral estimates drawn from convenience sampling methods can provide informative surveillance estimates of key behavioral indictors that can augment data from more rigorous national HIV behavioral surveillance surveys.
我们的目标是检验社区为基础的行为调查是否能增强旧金山男男性行为者（MSM）中全国艾滋病毒行为监测系统（NHBS）收集的数据。
我们对比了 2004 年和 2008 年 NHBS 两个周期以及同年 STOP AIDS Project（SAP）外展调查的数据，评估了 MSM 的性行为风险。我们对比了无保护肛交（UAI）和其他指标的估计值，以评估不同方法学估计值的一致性。
在进行的 3248 次访谈中，NHBS 样本包括更多的非白人和年龄较大的 MSM，更多的自我报告 HIV 阳性者，以及较少的性活跃者。NHBS 调查中最近 6 个月 UAI 的估计值略高于 SAP 调查（2004 年：40%比 36%，P = 0.03；2008 年：44%比 38%，P = 0.08）。在 2008 年，我们可以测量受访者-伴侣 HIV 不一致的情况，与潜在不一致伴侣发生 UAI 的估计值相似（12%比 12%，P = 0.87）。同样，NHBS 和 SAP 调查也观察到了具有潜在不一致伴侣的高风险定位的 UAI 相似估计值（HIV 阳性男性报告与潜在 HIV 阴性伴侣发生插入性 UAI：13%比 11%，P = 0.45；HIV 阴性男性报告与潜在 HIV 阳性伴侣发生接受性 UAI：5%比 4%，P = 0.85）。
来自便利抽样方法的行为估计可以提供关于关键行为指标的有信息的监测估计值，这些估计值可以增强来自更严格的全国艾滋病毒行为监测调查的数据。
