*  Value-Based Design and Prescription Drug Utilization Patterns Among Diabetes Patients
... program enrollees were then matched to enrollees in each of the comparison groups.. A panel data file was constructed with ... A psychiatric patient classifi cation system: an alternative to diagnosis-related groups. Med Care. 1989;27(5): 543-557.. 20. ... Practical considerations on the use of the Charlson comorbidity index with administrative data bases. J Clin Epidemiol. 1996;49 ... and enrollee comparison group membership, which estimated fixed effects common to both groups or unique to the comparison group ...
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