Furthermore, the AUC value for autoimmune conditions was 0.71 (95% CI 0.70–0.72) for CRP and 0.71 (95% CI 0.69–0.72) for ESR whereas the AUC for combined CRP and ESR was marginally higher, 0.72 (95% CI 0.71–0.74), but still considerably below that observed for SAA in our study. Here, CRP is linked to Autoimmunity.