Table 2 Description of Other Variables Used in the Analysis
From: Spatial analysis of elderly access to primary care services
Variable | Description | Source and level |
|---|---|---|
Facilities and Utilization Data | ||
BEDREHAB | Number of beds in a PPS exempt rehabilitation unit of a hospital | CMS Provider of Service (POS), ZIP code |
VISITS | Medicare Part B and outpatient primary care visits or ambulatory care visits, per Medicare Part B and outpatient beneficiary resident in the PCSA, plus number of primary care visits to rural health clinics or federally qualified health clinics per Medicare outpatient beneficiary resident in the PCSA | CMS CECS DENOM & Part B & Outpatient, PCSA |
Practitioner Data | ||
TOTDOCS | Count of clinically active specialists and primary care physicians per 1,000 population | AMA/AOA Masterfiles, PCSA |
ALT_DOC | Ratio of the count of nonphysician clinicians to physicians, by state, 1995 | Cooper et al, 1998b; state |
IMG_RATIO | Ratio of the count of international medical graduate physicians to clinically active specialists and primary care physicians | AMA/AOA Masterfiles, PCSA |
Market Conditions Data | ||
MCPENE00 | MMC PENETRATION of Medicare beneficiaries in 2000 | CMS Geographic Service Area File, county |
CINCREASE | Binary indicator of an increase in competition among the MMC plans available, between 1998–2000, from inverse Herfindahl index | CMS Geographic Service Area File, county |
XHMO00 | Penetration of state population by commercial HMOs, 2000 | InterStudy, state |
XHMODIF | Change in penetration of state population by commercial HMOs, 1994 – 2000 | InterStudy, state |
XPPO00 | Penetration of state population by commercial PPOs, 2000 | InterStudy, state |
XPPODIF | Change in penetration of state population by commercial PPOs, 1994 – 2000 | InterStudy, state |
SHRLARG3(%) | Percent market share of the largest three commercial group market insurers in 1997–2001 | Academy for Health Services Research and Health Policy, state |
ECOV97_9(%) | Percent of elderly who have employer-sponsored health insurance | American Association of Retired Persons (AARP), state |
PRICE00A($) | Annual premium for AARP's MediGap Plan A, 2000 | RTI analysis of AARP MediGap premiums, state |