[Factors affecting the increase in hospitalized medical care expenditure in Japan: analysis of national data in all 47 prefectures].
To clarify factors affecting the increase in annual expenditure for hospitalized medical care in Japan, the effects of the following four variables in all 47 prefectures were analyzed: (1) the hospitalized medical care expenditure per day per inpatient, (2) the number of admissions per population base, (3) average length of stay of patients in hospital per year and (4) the number of hospital beds per population base. The annual expenditure for hospitalized medical care per population base was correlated most significantly with the number of hospital beds per population base. The annual expenditure was also significantly correlated positively with the number of admissions per population base and average length of stay of patients in hospital per year, and inversely with the hospitalized medical care expenditure per day per inpatient. Hospitalized medical care expenditure per day per inpatient was inversely correlated with average length of stay of patients in hospital and the number of hospital bed per population base. Results from stepwise multiple regression analysis indicated that the number of hospital bed per population base and the hospitalized medical care expenditure per day per inpatient are the only two variables which have significant effects on the annual expenditure for hospitalized medical care per population base. The annual rate of increase for annual expenditure for hospitalized medical care per population base from 1980 to 1986 was 6.1%. Similarly, the rate of increase in the hospitalized medical care expenditure per day per inpatient was 3.5%; that of the number of admissions per population base was 3.1%.(ABSTRACT TRUNCATED AT 250 WORDS)
Shimmura
K
K
Department of Public Health, Faculty of Medicine, University of Tokyo.
Araki
S
S
D017048:Health Care Costs; D005102:Health Expenditures; D006760:Hospitalization / Q000191:economics* / Q000706:statistics & numerical data; D006801:Humans; D007564:Japan; D007902:Length of Stay / Q000191:economics / Q000706:statistics & numerical data; D009313:National Health Programs / Q000191:economics; D012044:Regression Analysis