BACKGROUND Key Population size estimation (PSE) is instrumental for HIV/STI preventive, treatment and care services planning, implementation and delivery. The objective was to estimate the overall population of female sex workers (FSW) in all the 16 regions of Ghana using different PSE methods. METHOD Mapping of venues and complete enumeration of seaters was conducted at the formative stage prior to the bio-behavioral survey (BBS). Three PSE methods were used to derive the size estimates of FSW in the 16 regions. These include: Capture-recapture (CRC), service multiplier and three-source capture recapture (3SCRC) methods. The final choice of the estimation method used to estimate the roamer population was 3SCRC. This method was chosen because of its perfect record-linkage-hierarchic combination of three names that minimizes overmatching as well as the addition of an interaction term in the model which corrects for the dependencies in CRC. RESULTS The total population size estimate of the female sex workers in the country obtained for roamers using capture re-capture was 41,746 (95% CI: 41,488-41,932). Using the service multiplier, the total population for both the roamers and seaters was 41,153 (95% CI: 37,242-45,984). The 3-source capture re-capture yielded 55,686 roamers FSW (95% CI: 47,686-63,686). The seater population was 4,363 FSW based on census/complete enumeration. The total population size estimate of FSW (seaters and roamers) in Ghana was 60,049 when 3SCRC and census were added. This represents about 0.76% of all estimated adult females aged 15-49yrs in Ghana. CONCLUSION We report population size estimates (PSE) for FSW in Ghana. These estimates are the results of 3SCRC. These findings provide a valid and reliable source of information that should be referenced by government officials and policymakers to plan, implement and provide HIV/STI preventive, treatment, and care services for FSW in Ghana.

中文翻译：

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2020 年加纳女性性工作者的全国和地方规模估计：将 3 源捕获-再捕获与其他方法进行比较。

背景 关键人口规模估计 (PSE) 有助于 HIV/STI 预防、治疗和护理服务的规划、实施和提供。目的是使用不同的 PSE 方法估计加纳所有 16 个地区的女性性工作者 (FSW) 的总人口。方法 在生物行为调查 (BBS) 之前的形成阶段，对场地进行绘图和完整的座位计数。三种 PSE 方法用于推导出 16 个地区的 FSW 大小估计。其中包括：捕获-重新捕获 (CRC)、服务乘法器和三源捕获重新捕获 (3SCRC) 方法。用于估计漫游人口的估计方法的最终选择是 3SCRC。之所以选择这种方法，是因为它完美地将三个名称的记录-链接-层次组合最小化，最大限度地减少了过度匹配，以及在模型中添加了一个交互项，以纠正 CRC 中的依赖关系。结果 使用捕获重新捕获为漫游者获得的该国女性性工作者的总人口规模估计为 41,746（95% CI：41,488-41,932）。使用服务乘数，漫游者和坐席者的总人口为 41,153（95% CI：37,242-45,984）。3 源捕获重新捕获产生 55,686 漫游者 FSW（95% CI：47,686-63,686）。根据人口普查/完整查点，就座人口为 4,363 FSW。添加 3SCRC 和人口普查后，加纳的 FSW（座位和漫游者）的总人口规模估计为 60,049。这代表大约 0。在加纳 15-49 岁的所有估计成年女性中占 76%。结论 我们报告了加纳 FSW 的人口规模估计 (PSE)。这些估计是 3SCRC 的结果。这些调查结果提供了一个有效和可靠的信息来源，政府官员和政策制定者应该参考这些信息来为加纳的 FSW 计划、实施和提供 HIV/STI 预防、治疗和护理服务。