Trend and Forecast of the Medical Care Utilization Rate, the Medical Expense per Case and the Treatment Days per Cage in Medical Insurance Program for Employees by ARIMA Model

ARIMA모델에 의한 피용자(被傭者) 의료보험(醫療保險) 수진율(受診率), 건당진료비(件當診療費) 및 건당진료일수(件當診療日數)의 추이(推移)와 예측(豫測)

  • Jang, Kyu-Pyo (Graduate School of Public Health, Kyungpook National University) ;
  • Kam, Sin (Department of Preventive Medicine and Public Health, School of Medicine, Kyungpook National University) ;
  • Park, Jae-Yong (Department of Preventive Medicine and Public Health, School of Medicine, Kyungpook National University)
  • 장규표 (경북대학교 보건대학원) ;
  • 감신 (경북대학교 의과대학 예방의학교실) ;
  • 박재용 (경북대학교 의과대학 예방의학교실)
  • Published : 1991.09.01

Abstract

The objective of this study was to provide basic reference data for stabilization scheme of medical insurance benefits through forecasting of the medical care utilization rate, the medical expence per case, and the treatment days per case in medical insurance program for government employees & private school teachers and for industrial workers. For the achievement of above objective, this study was carried out by Box-Jenkins time series analysis (ARIMA Model), using monthly statistical data from Jan. 1979 to Dec. 1989, of medical insurance program for government employees & private school teachers and for industrial workers. The results are as follows ; ARIMA model of the medical care utilization rate in medical insurance program for government employees & private school teachers was ARIMA (1, 1, 1) and it for outpatient in medical insurance program for industrial workers was ARIMA (1, 1, 1), while it for inpatient in medical insurance program for industrial workers was ARIMA (1, 0, 1). ARIMA model of the medical expense per case in medical insurance program for government employees & private school teachers and for outpatient in medical insurance program for industrial workers were ARIMA (1, 1, 0), while it for inpatient in medical insurance program for industrial workers was ARIMA (1, 0, 1). ARIMA model of the treatment days per case of both medical insurance program for government employees & private school teachers and industrial workers were ARIMA (1, 1, 1). Forecasting value of the medical care utilzation rate for inpatient in medical insurance program for government employees & private school teachers was 0.0061 at dec. 1989, 0.0066 at dec. 1994 and it for outpatient was 0.280 at dec. 1989, 0.294 at dec. 1994, while it for inpatient in medical insurance program for industrial workers was 0.0052 at dec. 1989, 0.0056 at dec. 1994 and it for outpatient was 0.203 at dec. 1989, 0.215 at 1994. Forecasting value of the medical expense per case for inpatient in medical insurance program for government employees & private school teachers was 332,751 at dec. 1989, 354,511 at dec. 1994 and it for outpatient was 11,925 at dec. 1989, 12,904 at dec. 1994, while it for inpatient in medical insurance program for industrial workers was 281,835 at dec. 1989, 293,973 at dec. 1994 and it for outpatient was 11,599 at dec. 1989, 11,585 at 1994. Forecasting value of the treatment days per case for inpatient in medical insurance program for government employees & private school teachers was 13.79 at dec. 1989,13.85 at an. 1994 and in for outpatient was 5.03 at dec. 1989, 5.00 at dec. 1994, while it for inpatient in medical insurance program for industrial workers was 12.23 at dec. 1989, 12.85 at dec. 1994 and it for outpatient was 4.61 at dec. 1989, 4.60 at 1994.

공무원 및 사립학교교직원 의료보험과 직장의료보험에서 입원, 외래별 수진을, 건당진료비 (1985년 기준 불변가격), 건당진료일수 등의 장래예측을 통해 의료보험 진료비 안정화 방안을 마련하는데 기초자료로 제시하기 위하여, 이들의 $1979{\sim}89$년간 월별 통계자료를 이용, Box-Jenkins model인 ARIMA 모델을 적용하여 1994년 까지의 수진을, 건당진료비 및 건당진료일수를 예측한 결과를 요약하면 다음과 같다. 수진을, 건당진료비 및 건당진료일수의 ARIMA 모형을 제시하면 다음 표와 같다. 상기의 ARIMA 모형을 기초로하여 향후 5년간의 수진율을 예측한 결과, 공교의료보험 입원의 경우, 1989년의 실측치는 0.068건 이었으며, 1990년과 1991년은 0.068건, 1992년과 1993년은 0.069건, 1994년은 0.070건으로 연평균 0.7%정도 증가될 것으로 예측되었으며, 외래의 경우, 1989년의 실측치는 3.487건이었으나 1990년은 3.530건, 1994년은 3.668건으로 연평균 1%정도 증가될 것으로 예측되었다. 직장의료보험 입원의 경우, 1989년의 실측치는 0.063건이었으며, 1990년부터 1994년까지 모두 0.063건으로 안정될 것으로 예측되었으며, 외래의 경우 1989년의 실측치는 2.984건이었으나, 1990년은 3.016건, 1994년은 3.154건으로 연평균 1.1% 정도 증가될 것으로 예측되었다. 건당진료비의 향후 예측치는 12월을 기준으로하여 1985년 불변가격으로 공교의료보험 입원의 경우, 1989년의 실측치는 332,751원이었으나, 1990년은 345,938원, 1994년은 354,511원으로 연평균 0.6%정도 증가될 것으로 예측되었으며, 외래의 경우, 1989년의 실측치는 11,925원이었으나, 1990년은 12,638원, 1994년은 12,904원으로 연평균 0.5%정도 증가될 것으로 예측되었다. 직장의료보험 입원의 경우, 1989년 실측치는 281,835원이었으나, 1990년은 282,524원, 1994년은 293,973원으로 연평균 1%정도 증가될 것으로 예측되었으며, 외래의 경우, 1989년 실측치는 11,599원이었으나, 1990년부터 1994년까지 11,585원으로 안정될 것으로 예측되었다. 건당진료일수의 향후 예측치는 12월을 기준으로 하여 공교의료보험 입원의 경우, 1989년의 실측치는 13.79일이었으며, 1990년은 13.82일, 1993년과 1994년은 13.85일로 거의 안정될 것으로 예측되었으며, 외래의 경우, 1994년까지 5일 정도로 안정될 것으로 예측되었다. 직장의료보험 입원의 경우, 1989년의 실측치는 12.23일이었으나, 1990년은 12.30일, 1994년은 12.85일로 연평균 1.1%정도 증가될 것으로 예측되었으며, 외래의 경우 1989년의 실측치는 4.61일이었으며 1990년부터 1994년까지 4.60일로 안정될 것으로 예측되었다.

Keywords