doi: 10.1016/j.healthplace.2009.06.002. Epub 2009 Jun 18.
An enhanced two-step floating catchment area (E2SFCA) method for measuring spatial accessibility to primary care physicians
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- PMID:19576837
- DOI: 10.1016/j.healthplace.2009.06.002
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An enhanced two-step floating catchment area (E2SFCA) method for measuring spatial accessibility to primary care physicians
Wei Luo et al. Health Place.2009 Dec.
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- Health Place. 2011 Jan;17(1):394
Abstract
This paper presents an enhancement of the two-step floating catchment area (2SFCA) method for measuring spatial accessibility, addressing the problem of uniform access within the catchment by applying weights to different travel time zones to account for distance decay. The enhancement is proved to be another special case of the gravity model. When applying this enhanced 2SFCA (E2SFCA) to measure the spatial access to primary care physicians in a study area in northern Illinois, we find that it reveals spatial accessibility pattern that is more consistent with intuition and delineates more spatially explicit health professional shortage areas. It is easy to implement in GIS and straightforward to interpret.
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