Fig. 1From: The risk of coronary artery disease in patients with rheumatoid arthritis using Chinese herbal products and conventional medicine in parallel: a population-based cohort studyFlow recruitment chart of patients with rheumatoid arthritis (RA) from the Registry Database for Catastrophic Illness Certificate. After excluding patients not fitting the inclusion criteria, both the CHP and non-CHP groups comprised 4889 patients after 1:1 matching by sex, age, index year, and initial diagnosis year of RABack to article page