Abstract
Limited studies examined Medical Aid recipients' perception for amount of medical use. This study aimed to identify self-perception(optimal, un der and overutilization) for amount, and real amount of medical use, and to determine fa ctors associated with the perception. Subjects were 2,489 Medical Aid recipients among top 2% over users in 2005. 200 case managers(CM) managing them conducted survey. CM interviewe d them using 2005 medical claiming data from the Health Insurance Review & A ssessment Service and structured questionnaire. Despite of overusers, perception of overutilization was only 26.9% and 23.6% in Class I and Class II, and that of underutilization was 21.4%
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