PRL and rheumatoid arthritis: Nonetheless, we were able to consider the effect and predictive capacity of a set of SNPs (ANKRD55, PRL, C5orf30, BLK, STAT4, and NFIA); though their aggregate association with anti‐CCP–negative RA is important (OR 2.74 [95% CI 1.92–3.91]) (P = 2.41 × 10−8), their predictive capacity remains very low (AUC 0.55).