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Table 1 Demographic characteristics of rheumatoid arthritis patients and controls in the MyEIRA study population

From: Polymorphisms in peptidylarginine deiminase associate with rheumatoid arthritis in diverse Asian populations: evidence from MyEIRA study and meta-analysis

Characteristic Malay Chinese Indian Others
  RA (n= 516) Controls (n= 986) RA (n= 255) Controls (n= 206) RA (n= 379) Controls (n= 285) RA (n= 88) Controls (n= 93)
Female 86.8 88.1 83.5 86.9 87.9 84.6 84.1 90.4
Age (years) 46 (11.8) 46 (11.4) 52 (11.2) 52 (11.3) 48 (11.6) 49 (10.6) 49 (12.1) 45 (11.7)
ACPA-positive 60.5 2.4 66.3 3.4 67.3 2.1 70.5 1.1
IgM RF-positive 47.5 3.8 49.4 3.4 55.9 5.3 62.5 6.4
IgG RF-positive 48.4 6.3 49.4 6.8 54.1 6.3 64.8 7.4
DRB1 SE-positivea 35.5 13.1 36.5 12.1 48.5 30.2 40.9 17.0
  1. Data presented as percentage or mean (standard deviation). ACPA, anti-citrullinated protein antibody; MyEIRA, Malaysian Epidemiological Investigation of Rheumatoid Arthritis; RA, rheumatoid arthritis; RF, rheumatoid factor; SE, shared epitope. aPatients and controls carrying one or two alleles of a SE were classified as SE-positive.