DPC (Diagnosis Procedure Combination) is a patient classification system in Japan. DPC data E and F files contain detailed information such as general anesthesia duration, and dosages for all medication prescribed. We obtained patient data from 133 hospitals, between April 2006 and March 2008, from the specific components of the DPC database known as the E and F files.
As possible indicators for assessing operation management, we offer the following variables. Using data from the E and F files of the DPC database, we calculated:
• x) Procedural fee per OR per month
• a) Number of operations per OR per month
• b) Procedural fee per operation
• c) Total utilization times of each OR per month
• d) Procedural fee per OR per hour
In order to take into account hospital variations while analyzing reimbursement, we carried out a multiple linear regression analysis at the hospital level. The dependent variable was the procedural fee per OR per month, and the independent variables were the number of surgeons per OR and the total number of beds.
Next, for surgery volume, another multiple linear regression analysis was conducted. The dependent variable was the number of operations per OR per month, and the independent variables were the number of surgeons per OR, and the total number of beds.
Finally, we conducted a multi-institutional comparison of expected and observed values for the dependent variables from both regression models in 133 hospitals.