William P. Brandon, Rajeshwari Sundaram, Ashley A. Dunham
Abstract:This case study (n=41,969) aims to discover managerially useful predictors of multiple switching among HMOs in a Medicaid managed care population observed over 33 months. Cox's proportional hazards model was used to analyze eligibility data for the entire population, claims data for Medicaid services received during six months prior to HMO enrollment (sample n=2,474) and telephone interviews (sample n=656). Each analytic stage involved four comparisons: (1) enrollees with one switch compared with enrollees wit…
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