title: Mediclaim Hospital Discharge System and income levels of cohort.
authors.affiliation: Duke NUS Graduate Medical School, Singapore. Electronic address: chuashunjie@nus.edu.sg.
authors.forename: S J
authors.initials: SJ
authors.lastname: Chua
authors.affiliation: Department of Rheumatology, Jiangsu University Affiliated Hospital, China.
authors.forename: J
authors.initials: J
authors.lastname: Li
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D020370:Osteoarthritis, Knee / Q000209:etiology* / Q000601:surgery*; D012907:Smoking / Q000009:adverse effects*
keywords: Database management; Epidemiology; Income levels; OA; Osteoarthritis; Research methods