[The value of postoperative C-reactive protein in predictive diagnosis of postoperative intra-abdominal septic complications for patients with Crohn disease].

Objective To analyze the value of postoperative C-reactive protein (CRP) in predictive diagnosis of postoperative intra-abdominal septic complications (IASC) for patients with Crohn disease (CD). Methods Clinical data of patients with CD received intestinal resection and anastomosis surgery at Research Institute of General Surgery, Jinling Hospital from January 2011 to January 2015 were analyzed. Patients were divided into two groups by whether suffer from IASC 1 month after surgery, including IASC group and no-IASC group. Propensity score matching method was used to match the general clinical data. A total of 54 patients were analyzed, including IASC 17 cases, no-IASC 37 cases. Postoperative CRP at 1-day and 3-day were compared between the two groups using t test. Receiver operator characteristic (ROC) cure was used to analyze the value of postoperative CRP in predictive diagnosis of IASC. Results IASC group had higher levels of CRP at 1-day ((78±13) mg/L vs. (54±19) mg/L, t=4.633, P=0.000) and 3-day ((103±19) mg/L vs. (69±21) mg/L, t=5.859, P=0.000) after surgery than no-IASC group. ROC analysis showed that the CRP 3-day after surgery cut-off point value of 81.45 mg/L, as used for the predictive diagnosis of IASC, provided a sensitivity of 94.1%, a specificity of 82.9%, an area under the curve of 0.90, better than CRP 1-day after surgery. Conclusion Postoperative CRP can be used as a predictive diagnosis of IASC for CD patients received intestinal resection and anastomosis surgery. Key words: Crohn disease; C-reactive protein; Postoperative complications; Early diagnosis