different areas. Our study focused on the prevalence of RA in Taiwan from 2001 to 2011.
This study contained longitudinal enrollment files, claims data, catastrophic illness files, and
treatment registries from Taiwan Longitudinal Health Insurance Research Database. We
identified RA patients by ICD-9-CM code 714.0. The demographical variables including age,
sex, income and area of registration were evaluated. The multivariate Poisson regression …