Geoadditive models
Geoadditive models
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DOI：
10.1111/1467-9876.00385
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发表时间：
2003-01-01
影响因子：
1.6
通讯作者：
Wand, MP
中科院分区：
文献类型：
--
作者：
Kammann, EE;Wand, MP
对美国马萨诸塞州上科德角生殖健康结果（如出生体重）的地理变异性进行的一项研究得益于地统计制图或克里金法。然而，也观察到一些连续协变量（如母亲年龄）与响应变量之间存在明显的非线性关系。为了正确地解释这种影响，我们将克里金法与加法模型合并，以获得我们所谓的地理加法模型。通过将两者表示为线性混合模型，合并变得毫不费力。所得到的地理叠加模型的混合模型表示允许使用标准方法和软件进行拟合和诊断。
A study into geographical variability of reproductive health outcomes (e.g. birth weight) in Upper Cape Cod, Massachusetts, USA, benefits from geostatistical mapping or kriging. However, also observed are some continuous covariates (e.g. maternal age) that exhibit pronounced non-linear relationships with the response variable. To account for such effects properly we merge kriging with additive models to obtain what we call geoadditive models. The merging becomes effortless by expressing both as linear mixed models. The resulting mixed model representation for the geoadditive model allows for fitting and diagnosis using standard methodology and software.