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arXiv 1607.07002stat.ME
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用生成模型进行疾病映射

Disease Mapping with Generative Models

Feifei Wang, Jian Wang, Alan E. Gelfand, Fan Li

摘要:

疾病分布图侧重于了解呈现高相对风险的区域单位。疾病计数的疾病映射模型指定了与预期计数相比的相对风险的Poisson回归。这些模型通常包含空间随机效应以实现空间平滑。这些模型的拟合通常通过内部标准化来计算预期的疾病计数。这将数据放在模型的两侧,即,计数在左侧,但它们也用于获得右侧的预期计数。因此,这些内部标准化模型是不连贯的,没有生成性;从概率上讲,它们无法产生观察到的数据。在这里,我们主张采用直接生成模型的疾病计数。我们使用广义逻辑斯谛回归对疾病发病率而不是相对风险进行建模。我们提取模型拟合后的相对风险。我们还将生成模型扩展到动态设置。我们通过模拟数据集和俄亥俄州的肺癌发病率数据将生成模型与内部标准化模型进行比较。每个模型都是一个空间平滑器,它们在相对风险方面对数据进行了类似的平滑。然而,生成模型倾向于提供更紧密的可信区间。由于生成规范是没有更难适应,是连贯的,至少是良好的inclusion,我们建议它应该是空间疾病映射的选择模型。

英文摘要:

Disease mapping focuses on learning about areal units presenting high relative risk. Disease mapping models for disease counts specify Poisson regressions in relative risks compared with the expected counts. These models typically incorporate spatial random effects to accomplish spatial smoothing. Fitting of these models customarily computes expected disease counts via internal standardization. This places the data on both sides of the model, i.e., the counts are on the left side but they are also used to obtain the expected counts on the right side. As a result, these internally standardized models are incoherent and not generative; probabilistically, they could not produce the observed data. Here, we argue for adopting the direct generative model for disease counts. We model disease incidence instead of relative risks, using a generalized logistic regression. We extract relative risks post model fitting. We also extend the generative model to dynamic settings. We compare the generative models with internally standardized models through simulated datasets and a well-examined lung cancer morbidity data in Ohio. Each model is a spatial smoother and they smooth the data similarly with regard to relative risks. However, the generative models tend to provide tighter credible intervals. Since the generative specification is no more difficult to fit, is coherent, and is at least as good inferentially, we suggest it should be the model of choice for spatial disease mapping.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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