Table 1 |
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|
Demographic characteristics of rheumatoid arthritis patients and controls in the MyEIRA study population |
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|
Characteristic |
Malay |
Chinese |
Indian |
Others |
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|
|
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|
RA (n = 516) |
Controls (n = 986) |
RA (n = 255) |
Controls (n = 206) |
RA (n = 379) |
Controls (n = 285) |
RA (n = 88) |
Controls (n = 93) |
|
|
|
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|
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 |
|
|
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|
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. |
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|
Too et al. Arthritis Research & Therapy 2012 14:R250 doi:10.1186/ar4093 |
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