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. 1989 Summer;10(4):17–29.
65YRF Women 65-69 years of age (in the first base year) who were not receiving welfare and whose original reason for Medicare entitlement was becoming 65 years old (rather than a disability identified at an earlier age).
NOCOST A subset of those in group 65YRF defined by having no Medicare reimbursement in the prior year.
CVD/CA Anyone hospitalized in the prior year for cerebrovascular disease and/or cancer (Eighth Revision International Classification of Diseases codes 140- 201 or 430-438).
2HOSPS Anyone with at least two hospitalizations in the prior year.