The Complexity of Chronic Disease at Later Ages: Practical Implications for Prospective Payment and Data Collection

The diagnosis related groups system developed to pay for Medicare services under prospective payment has certain built-in constraints, owing to limitations in the data available at the time. To identify additional dimensions potentially relevant to case mix, we used a multivariate grouping model—&qu...

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Bibliographic Details
Published in:Inquiry (Chicago) 1986, Vol.23 (2), p.154-165
Main Authors: Vertrees, James, Manton, Kenneth G.
Format: Article
Language:English
Subjects:
Aged
Breast Neoplasms - economics
Chronic Disease - economics
Data Collection - methods
Diabetes
Diagnosis-Related Groups
Digestive system diseases
Diseases
Female
Humans
Leukemia - economics
Lung Neoplasms - economics
Lymphatic diseases
Male
Maryland
Medicare
Mental illness
Musculoskeletal diseases
Myocardial ischemia
Nervous system diseases
Patients - classification
Prospective Payment System
Pulmonary heart disease
Reimbursement Mechanisms
Severity of Illness Index
Skin diseases
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Summary:The diagnosis related groups system developed to pay for Medicare services under prospective payment has certain built-in constraints, owing to limitations in the data available at the time. To identify additional dimensions potentially relevant to case mix, we used a multivariate grouping model—"Grade of Membership"—on discharge records for patients 65 years of age and older hospitalized in Maryland in 1981 with diagnoses of breast cancer, leukemia, or lung cancer. We found that five dimensions are required to accurately type patients: prognosis, disease severity, the interaction effect of multiple illnesses, admission status, and treatment strategy. We also found that at least three possible stages of treatment can be identified and classified. We discuss the implications of our findings for DRG classification, administrative billing records, and the ICD-9 system.
ISSN:0046-9580
1945-7243