Table 1.

Global Test of Spatial Autocorrelation of Physicians and Pharmacists Per Capita: Moran's I a

	Physicians				Pharmacists
	Euclidean		Manhattan		Euclidean		Manhattan
Census Tract	Moran's I	p‐value	Moran's I	p‐value	Moran's I	p‐value	Moran's I	p‐value
Contiguity neighborsb	.11	<.001	—	—	−.0005	.50	—	—
Inverse‐distance (approach 1)c	.032	<.001	.040	<.001	−.0002	.91	−.0002	.17
Inverse‐distance (approach 2)d	.009	<.001	.015	<.001	−.0004	.13	−.0004	.10

^aThe expected value of Moran's I for 5,254 census tracts is −.00019.

^bNeighbors were assigned using first‐order queen method where census tracts that share a border are neighbors. Contiguity neighbor method does not depend on Euclidean and Manhattan distance calculations.

^cCensus tracts whose centroids were 8,047 meters (5 miles) from other census tracts were considered neighbors. A minimum of 1 identified neighbor was specified in cases where the distance measured from the centroid of a census tract to nearest neighboring census tract was greater than 8,047 meters.

^dDistance bands were optimized to 84.25 kilometers (Euclidean) and 118.69 kilometers (Manhattan) to ensure at least 1 neighbor for each census tract due to very large census tracts in western Texas.