Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Iran.
AIDS Behav. 2013 Feb;17(2):623-31. doi: 10.1007/s10461-012-0285-z.
We quantified discrepancies in reported behaviors of female sex workers (FSW) by comparing 63 face-to-face interviews (FTFI) to in-depth interviews (IDI), with corroboration of the directions and magnitudes of reporting by a panel of psychologists who work with FSW. Sensitivities, specificities, positive and negative predictive values (PPV and NPV) were assessed for FTFI responses using IDI as a "gold standard". Sensitivities were lowest in reporting symptoms of sexually transmitted infections (63.9 %), finding sex partners in venues (52.4 %) and not receiving HIV test results (66.7 %). Specificities (all >83 %) and PPVs (all >74.0 %) were higher than NPV. FSW significantly under-reported number of clients, sexual contacts and non-condom use sex acts with clients and number of days engaging in sex work in the preceding week. This study provides a quantified gauge of reporting biases in FSW behaviors. Such estimates and methods help better understand true HIV risk in marginalized populations and calibrate survey estimates accordingly.
我们通过将 63 次面对面访谈（FTFI）与深入访谈（IDI）进行比较，定量分析了女性性工作者（FSW）报告行为中的差异，并由一组与 FSW 合作的心理学家对报告的方向和程度进行了证实。我们使用 IDI 作为“金标准”评估了 FTFI 反应的敏感性、特异性、阳性预测值（PPV）和阴性预测值（NPV）。报告性传播感染症状的敏感性最低（63.9%），在场所寻找性伴侣的敏感性（52.4%）和未收到 HIV 检测结果的敏感性（66.7%）最低。特异性（均>83%）和阳性预测值（均>74.0%）均高于阴性预测值。FSW 显著低估了客户数量、性接触次数和与客户发生的未使用安全套的性行为次数，以及上周从事性工作的天数。本研究提供了 FSW 行为报告偏差的量化指标。这些估计和方法有助于更好地了解边缘化人群中的真实 HIV 风险，并相应地校准调查估计。
