Table 4.
Adjusted relative risks of RA by parity in subjects < 45 years old by DERAA positivity
| Controls (N = 332) | Cases (N = 167) | ||||
| N (%) | N (%) | RRa | 95% CI | p-value | |
| DERAA negative | |||||
| Nulliparous | 76 (32) | 73 (53) | 1.0 | ||
| Parous | 161 (68) | 65 (47) | 0.44 | 0.26 – 0.74 | 0.002 |
| DERAA positive | |||||
| Nulliparous | 34 (36) | 9 (31) | 1.0 | ||
| Parous | 61 (64) | 20 (69) | 0.95 | 0.34 – 2.65 | 0.92 |
a
adjusted for age, race (Caucasian vs. not), education level (college or more vs. less than college), marital status (married or living as married vs. other) and history of spontaneous abortion.