背景:正确识别空间疾病集群是公共卫生和流行病学的基本关注点。在空间流行病学和疾病监测中,空间扫描统计量广泛用于检测空间疾病簇。搜索空间簇时,许多研究默认将最大报告簇大小(MRCS)设置为总人口的50%。然而,此默认设置有时可以报告比真实集群大的集群,其中包括不太相关的地区。对于泊松来说,伯努利,序数,正常,和指数模型,基尼系数已经开发出来,以优化MRCS。然而,多项式模型没有可用的度量。
结果:我们提出了空间聚类信息标准(SCIC)的两个版本,用于为基于多项式的空间扫描统计量选择最佳MRCS值。我们的模拟研究表明,SCIC提高了报告真实聚类的准确性。对韩国社区健康调查(KCHS)数据的分析进一步表明,与默认设置相比,我们的方法可以识别出更有意义的小集群。
结论:我们的方法着重于在使用多项式模型时通过优化MRCS值来提高空间扫描统计量的性能。在公共卫生和疾病监测中,所提出的方法可以用于为多项数据提供更准确和有意义的空间聚类检测,如疾病亚型。
BACKGROUND: Correctly identifying spatial disease cluster is a fundamental concern in public health and epidemiology. The spatial scan statistic is widely used for detecting spatial disease clusters in spatial epidemiology and disease surveillance. Many studies default to a maximum reported cluster size (MRCS) set at 50% of the total population when searching for spatial clusters. However, this default setting can sometimes report clusters larger than true clusters, which include less relevant regions. For the Poisson, Bernoulli, ordinal, normal, and exponential models, a Gini coefficient has been developed to optimize the MRCS. Yet, no measure is available for the multinomial model.
RESULTS: We propose two versions of a spatial cluster information criterion (SCIC) for selecting the optimal MRCS value for the multinomial-based spatial scan statistic. Our simulation study suggests that SCIC improves the accuracy of reporting true clusters. Analysis of the Korea Community Health Survey (KCHS) data further demonstrates that our method identifies more meaningful small clusters compared to the default setting.
CONCLUSIONS: Our method focuses on improving the performance of the spatial scan statistic by optimizing the MRCS value when using the multinomial model. In public health and disease surveillance, the proposed method can be used to provide more accurate and meaningful spatial cluster detection for multinomial data, such as disease subtypes.