Spat Spatiotemporal Epidemiol - Spatial error in geocoding physician location data from the AMA Physician Masterfile: implications for spatial accessibility analysis.

Tópicos

{ spatial(1525) area(1432) region(1030) }
{ ehr(2073) health(1662) electron(1139) }
{ health(3367) inform(1360) care(1135) }
{ howev(809) still(633) remain(590) }
{ error(1145) method(1030) estim(1020) }
{ data(3963) clinic(1234) research(1004) }
{ perform(1367) use(1326) method(1137) }
{ age(1611) year(1155) adult(843) }
{ assess(1506) score(1403) qualiti(1306) }
{ use(976) code(926) identifi(902) }
{ studi(1410) differ(1259) use(1210) }
{ state(1844) use(1261) util(961) }
{ can(981) present(881) function(850) }
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{ detect(2391) sensit(1101) algorithm(908) }

Resumo

The accuracy of geocoding hinges on the quality of address information that serves as input to the geocoding process; however errors associated with poor address quality are rarely studied. This paper examines spatial errors that arise due to incorrect address information with respect to physician location data in the United States. Studies of spatial accessibility to physicians in the U.S. typically rely on data from the American Medical Association's Physician Masterfile. These data are problematic because a substantial proportion of physicians only report a mailing address, which is often the physician's home (residential) location, rather than the address for the location where health care is provided. The incorrect geocoding of physicians' practice locations based on inappropriate address information results in a form of geocoding error that has not been widely analyzed. Using data for the Chicago metropolitan region, we analyze the extent and implications of geocoding error for measurement of spatial accessibility to primary care physicians. We geocode the locations of primary care physicians based on mailing addresses and office addresses. The spatial mismatch between the two is computed at the county, zip code and point location scales. Although mailing and office address locations are quite close for many physicians, they are far apart (>20 km) for a substantial minority. Kernel density estimation is used to characterize the spatial distribution of physicians based on office and mailing addresses and to identify areas of high spatial mismatch between the two. Errors are socially and geographically uneven, resulting in overestimation of physician supply in some high-income suburban communities, and underestimation in certain central city locations where health facilities are concentrated. The resulting errors affect local measures of spatial accessibility to primary care, biasing statistical analyses of the associations between spatial access to care and health outcomes.

Resumo Limpo

accuraci geocod hing qualiti address inform serv input geocod process howev error associ poor address qualiti rare studi paper examin spatial error aris due incorrect address inform respect physician locat data unit state studi spatial access physician us typic reli data american medic associ physician masterfil data problemat substanti proport physician report mail address often physician home residenti locat rather address locat health care provid incorrect geocod physician practic locat base inappropri address inform result form geocod error wide analyz use data chicago metropolitan region analyz extent implic geocod error measur spatial access primari care physician geocod locat primari care physician base mail address offic address spatial mismatch two comput counti zip code point locat scale although mail offic address locat quit close mani physician far apart km substanti minor kernel densiti estim use character spatial distribut physician base offic mail address identifi area high spatial mismatch two error social geograph uneven result overestim physician suppli highincom suburban communiti underestim certain central citi locat health facil concentr result error affect local measur spatial access primari care bias statist analys associ spatial access care health outcom

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