CALCA and bacterial infectious disease: Univariate logistic regression analysis showed that PCT, neutrophil percentage, and lymphocyte percentage are associated with bacterial infection (OR 1.685, 95% CI 1.026–2.768, p = 0.039; OR 1.025, 95% CI 1.002–1.049, p = 0.035 and OR 0.963, 95% CI 0.936–0.991, p = 0.010; respectively).