Journal article
Estimating spatial variation in disease risk from locations coarsened by incomplete geocoding
Statistical methodology, Vol.9(1), pp.239-250
2012
DOI: 10.1016/j.stamet.2011.01.008
Abstract
Inference for spatial variation in relative risk of disease is an important problem in spatial epidemiologic studies. A standard component of data assimilation in these studies is the assignment of a geocode, i.e. point-level spatial coordinates, to the address of each subject in the study population. Unfortunately, when geocoding is performed by the standard procedure of street-segment matching to a georeferenced road file and subsequent interpolation, it is rarely completely successful. Typically, 10-30% of the addresses in the study population fail to geocode, which can adversely affect relative risk estimation, especially if one of the disease groups (e.g. cases) has a different geocoding success rate than another (e.g. controls). The possibility exists, however, for ameliorating this effect by incorporating geographic information coarser than a point (e.g. a Zip code) that is measured for the observations that fail to geocode. This article develops coarsened-data methods for relative risk estimation from incompletely geocoded data. Nonparametric (kernel smoothing) estimation procedures are featured; parametric (likelihood-based) procedures are described as well, but their applicability is much more limited. We demonstrate, via simulation and a real example of childhood asthma cases in an Iowa county that substantial improvements in the quality of relative risk estimates are possible using the proposed nonparametric coarsened-data methods.
Details
- Title: Subtitle
- Estimating spatial variation in disease risk from locations coarsened by incomplete geocoding
- Creators
- Dale L Zimmerman - University of IowaXiangming Fang - East Carolina University
- Resource Type
- Journal article
- Publication Details
- Statistical methodology, Vol.9(1), pp.239-250
- Publisher
- Elsevier B.V
- DOI
- 10.1016/j.stamet.2011.01.008
- ISSN
- 1572-3127
- eISSN
- 1878-0954
- Language
- English
- Date published
- 2012
- Academic Unit
- Statistics and Actuarial Science; Biostatistics
- Record Identifier
- 9984257609002771
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