Risk factors for recurrence after bowel resection for Crohn’s disease

BACKGROUND Complications of Crohn’s disease such as intestinal obstruction, fistula or perforation often need surgical treatment. Nearly 70%-80% patients with Crohn’s disease would receive surgical treatment during the lifetime. However, surgical treatment is incurable for Crohn’s disease. The challenge of recurrence postoperatively troubles both doctors and patients. Over 50% patients would suffer recurrence postoperatively. Some certain risk factors are associated with recurrence of Crohn’s disease. AIM To evaluate the risk factors for endoscopic recurrence and clinical recurrence after bowel resection in Crohn’s disease. METHODS Patients diagnosed Crohn’s disease and received intestinal resection between April 2007 and December 2013 were included in this study. Data on the general demographic information, preoperative clinical characteristics, surgical information, postoperative clinical characteristics were collected. Continuous data are expressed as median (inter quartile range), and categorical data as frequencies and percentages. Kaplan-Meier method was applied to estimate the impact of the clinical variables above on the cumulative rate of postoperative endoscopic recurrence and clinical recurrence, then log-rank test was applied to test the homogeneity of those clinical variables. Multivariate Cox proportional hazard regression analysis was performed to identify the risk factors of postoperative endoscopic recurrence and clinical recurrence. RESULTS A total of 64 patients were included in this study. The median follow-up time for the patients was 17 (9.25-25.75) mo. In this period, 41 patients (64.1%) had endoscopic recurrence or clinical recurrence. Endoscopic recurrence occurred in 34 (59.6%) patients while clinical recurrence occurred in 28 (43.8%) patients, with the interval between the operation and recurrence of 13.0 (8.0-24.5) months and 17.0 (8.0-27.8) mo, respectively. In univariate analysis, diagnosis at younger age (P < 0.001), disease behavior of penetrating (P = 0.044) and preoperative use of anti-tumor necrosis factor (TNF) (P = 0.020) were significantly correlated with endoscopic recurrence, while complication with perianal lesions (P = 0.032) and preoperative use of immunomodulatory (P = 0.031) were significantly correlated with clinical recurrence. As to multivariate analysis, diagnostic age (P = 0.004), disease behavior (P = 0.041) and preoperative use of anti-TNF (P = 0.010) were independent prognostic factors for endoscopic recurrence, while complication with perianal lesions (P = 0.023) was an independent prognostic factor for clinical recurrence. CONCLUSION Diagnostic age, disease behavior, preoperative use of anti-TNF and complication with perianal lesions were independent risk factors for postoperative recurrence in Crohn’s disease.

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