BioMed Central Health Services Research
We test the hypothesis that hospital costs, after adjusting for DRG mix, are higher in distant patients than in local patients. Data were obtained from the Washington State Commission Hospital Abstract Reporting System (CHARS) and included all patients discharged from 15 metropolitan hospitals in the state of Washington during fiscal year 1987 (N = 181,072).
Welch, H G.; Larson, E B.; and Welch, W P., "Could Distance be a Proxy for Severity-of-Illness? A Comparison of Hospital Costs in Distant and Local Patients." (1993). Open Dartmouth: Faculty Open Access Articles. 625.