Table 7. Risk of developing ACPA-positive or ACPA-negative RA among carriers of SE (single, double or any) in the MyEIRA study population by ethnicity.
No SE* | Single SE | Double SE | Any SE | ||||||||
Cases | Controls | Cases | Controls | OR (95% CI) | Cases | Controls | OR (95% CI) | Cases | Controls | OR (95% CI) | |
Malay | |||||||||||
ACPA-positive | 140 | 600 | 100 | 79 | 5.29 (3.74–7.48) | 16 | 4 | 17.14(5.64–52.07) | 116 | 83 | 5.85(4.18–8.18) |
ACPA-negative | 119 | 30 | 1.87 (1.18–2.97) | 0 | 1.78 (1.12–2.82) | 30 | 1.82(1.15–2.89) | ||||
Chinese | |||||||||||
ACPA-positive | 72 | 147 | 54 | 17 | 6.49 (3.51–11.98) | 6 | 0 | 0.00(-)** | 60 | 17 | 7.20 (3.92–13.23) |
ACPA-negative | 62 | 9 | 1.26 (0.53–2.97) | 1 | 0.00(-)# | 10 | 4.74 (0.16–143.20) | ||||
Indian | |||||||||||
ACPA-positive | 88 | 148 | 98 | 56 | 2.75 (1.81–4.16) | 14 | 5 | 4.71 (1.64–13.52 | 112 | 61 | 2.89 (1.93–4.34) |
ACPA-negative | 65 | 29 | 1.10 (0.65–1.87) | 2 | 1.09 (0.65–1.82) | 31 | 0.91 (0.17–4.82) |
*Cases and controls without SE genes were used as reference groups.
**Fisher exact two-tailed p value, p = 0.0015.
#Fisher exact two-tailed p value, p = 0.3, NS.