| All | Men | Women | |||
---|---|---|---|---|---|---|
 | Cases n = 1,056 | Controls n = 1,416 | Cases n = 151 | Controls n = 211 | Cases n = 905 | Controls n = 1,205 |
Age, mean (SD) years | 47.7 (11.5) | 47.1 (11.4) | 50.1 (11.9) | 49.8 (11.9) | 47.3 (11.4) | 46.7 (11.3) |
Smoking status | Â | Â | Â | Â | Â | Â |
Never-smoker, n (%) | 927 (88) | 1,260 (89) | 61 (40) | 101 (48) | 866 (96) | 1159 (96.2) |
Ever-smoker, n (%) | 79 (7) | 65 (5) | 70 (46) | 60 (28) | 9 (1) | 5 (0.4) |
Information missing on smoking, n (%) | 50 (5) | 91 (6) | 20 (14) | 50 (24) | 30 (3) | 41 (3.4) |
Ethnic group | Â | Â | Â | Â | Â | Â |
Malay | 441 (42) | 893 (63) | 66 (44) | 126 (60) | 375 (41) | 767 (64) |
Chinese | 217 (20) | 183 (13) | 36 (24) | 31 (15) | 181 (20) | 152 (13) |
Indian | 323 (31) | 253 (18) | 37 (25) | 43 (20) | 286 (32) | 210 (17) |
Others | 75 (7) | 87 (6) | 12 (8) | 11 (5) | 63 (7) | 76 (6) |
ACPA status | Â | Â | Â | Â | Â | Â |
ACPA-positive RA, n (%) | 680 (64) | 32 (2) | 104 (69) | 5 (2) | 576 (64) | 27 (2) |
ACPA-negative RA, n (%) | 376 (36) | 1,383 (98) | 47 (31) | 206 (98) | 329 (36) | 1,177 (98) |
Presence of SE alleles | Â | Â | Â | Â | Â | Â |
None SE alleles, n (%) | 629 (60) | 1,183 (84) | 83 (55) | 181 (86) | 546 (60) | 1,002 (83) |
Any SE alleles, n (%) | 425 (40) | 233 (16) | 68 (45) | 30 (14) | 357 (39) | 203 (17) |