CALCA and bacterial infectious disease with sepsis: For bacteremia, AUROC of CRP, lactate, serum PCT, and whole blood PCT were 0.619 (95% CI, 0.523–0.715), 0.748 (95% CI, 0.669–0.826), 0.736 (95% CI, 0.646–0.826) and 0.736 (95% CI, 0.642–0.833), respectively.