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Table 1 Description of Population and Demographic Variables

From: Spatial analysis of elderly access to primary care services

Variable Description Source and primary level
Medicare FS Beneficiary Data
ACSCRATE Count of admissions for any of 11 ACSCs, per 1,000 Medicare FFS beneficiaries, in the ZIP code of residence CMS FFS MEDPAR claims, 1998–2000, ZIP code of residence
XMEN Proportion of FFS beneficiaries in the ZIP code of residence that are male "
XDUAL Proportion of FFS beneficiaries in the ZIP code of residence that are dually eligible for Medicare and Medicaid "
XBLACK Proportion of FFS beneficiaries in the ZIP code of residence that are black "
XOTHER Proportion of FFS beneficiaries in the ZIP code of residence that are other races than white or black "
XDIED Proportion of FFS beneficiaries in the ZIP code of residence that died "
XOLDER Proportion of FFS beneficiaries in the ZIP code of residence that are over 80 "
RISK Median PIP_DCG risk score for FFS beneficiaries in the ZIP code of residence "
HIQUINT Proportion of FFS beneficiaries in the ZIP code of residence that are above the median in PIP_DCG risk score "
XDIAB Proportion of FFS beneficiaries in the ZIP code of residence that are diabetic "
Demographic Census data
XELDERPOV Proportion of elderly in the census tract with 1999 income below the poverty level US Census, census tract
POVRATIO Ratio of proportion elderly in poverty to proportion general population in poverty "
XTRURELD Proportion elderly in the county who reside in rural census tracts "
RURATIO Ratio of proportion elderly in rural census tracts to the proportion of total population in rural census tracts "
XLIVALONE Proportion of elderly who live alone "
XLCOMUTE Proportion of the workforce that commute longer than 60 minutes to work, each way "
XPOORNE Proportion of the elderly population who speak little or no English "
PDENSITY Population per square mile "