Data Source
The data for this study were obtained from the National Health Insurance
Research Database (NHIRD). The Taiwan government launched a National
Health Insurance Program (NHIP) in 1995. NHIP provides comprehensive
medical care services to nearly all (99%) residents in Taiwan. The
health information, which includes claims of the inpatients and
outpatients and medications prescribed, was recorded in the NHIRD. For
patient privacy, the data were deidentified. In this cohort study, we
used all inpatient data from 2000 to 2013.