CRP and infection: In multivariate logistic regression analysis, the following factors were found to be independently associated with the development of IHCA: preexisting hypertension (OR 0.48, 95% CI 0.30–0.80), preexisting chronic pulmonary disease (OR 2.01, 95% CI 1.19–3.58), hepatobiliary infection source (OR 0.25, 95% CI 0.11–0.54), unknown infection source (OR 1.82, 95% CI 1.01–3.47), serum level of C-reactive protein (OR 1.03, 95% CI 1.01–1.04), and serum level of lactate 6 h from shock recognition (OR 1.34, 95% CI 1.22–1.47).