Inpatient care expenditure of the elderly with chronic diseases who use public health insurance: Disparity in their last year of life.

The Thai elderly are eligible for the Civil Servant Medical Benefit Scheme (CS) or Universal Coverage Scheme (UCS) depending on their pre-retirement or their children work status. This study aimed to investigate the disparity in inpatient care expenditures in the last year of life among Thai elderly individuals who used the two public health insurance schemes. Using death registration and inpatient administrative data from 2007 to 2011, our subpopulation group included the elderly with four chronic disease groups: diabetes mellitus, hypertension and cardiovascular disease, heart disease, and cancer. Among 1,242,150 elderly decedents, about 40% of them had at least one of the four chronic disease conditions and were hospitalized in their last year of life. The results showed that the means of inpatient care expenditures in the last year of life paid by CS and UCS per decedent were 99,672 Thai Baht and 52,472 Thai Baht, respectively. On average, UCS used higher healthcare resources by diagnosis-related group relative weight measure per decedent compared with CS. In all cases, the rates of payment for inpatient treatment per diagnosis-related group adjusted relative weight were higher for CS than UCS. This study found that the disparities in inpatient care expenditures in the last year of life stemmed mainly from the difference in payment rates. To mitigate this disparity, unified payment rates for various types of treatment that reflect costs of hospital care across insurance schemes were recommended.