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Japan established an original case-mix classification system in 2002, so called Diagnosis Procedure Combination (DPC). The main purposes of introducing the DPC system are providing transparency of hospital performance as well as implementing an electronic billing system. Researchers can utilize the DPC data to identify, track, and analyze national trends in health care utilization, access, quality, outcomes, and costs. The unique advantage of the DPC data is the inclusion of detailed process data and several clinical data, which can be applied to academic studies on clinical epidemiology and health services research. The present report reviews the details of the DPC data in term of the structure of the DPC, the scale and contents of the DPC database, and the usability of the DPC data for clinical epidemiology and health services research as compared with the US Nationwide Inpatient Sample database.
Yasunaga et al. (Thu,) studied this question.
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