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* = Presenting author

P667 The effects of azathioprine/6-mercaptopurine and TNF-alpha antagonist on surgery in Korean patients with Crohn's disease from the CONNECT cohort

H.M. Kim*1, H.-S. Kim1, J.H. Kim1, H.S. Kim1, K.J. Lee1, H.J. Park1, J.W. Kim1, J.S. Kim2, Y.S. Kim3, J.H. Cheon4, B.D. Ye5, Y.H. Kim6, D.S. Han7

1Yonsei University Wonju College of Medicine, Division of Gastroenterology and Hepatology, Wonju, South Korea, 2Seoul National Uinversity College of Medicine, Internal Medicine and Liver Research Institute, Seoul, Korea, Republic of, 3Inje University College of Medicine, Internal Medicine, Seoul, Korea, Republic of, 4Yonsei University College of Medicine, Internal Medicine and Institute of Gastroenterology, Seoul, Korea, Republic of, 5University of Ulsan College of Medicine, Asan Medical Center, Gastroenterology and Inflammatory Bowel Disease Center, Seoul, Korea, Republic of, 6Sungkyunkwan University School of Medicine, Department of Internal Medicine, Seoul, Korea, Republic of, 7Hanyang University Guri Hospital, Department of Internal Medicine, Guri, Korea, Republic of

Background

The complications of Crohn's disease often should be treated through surgical intervention. The risk factors of complications have been studied largely. However, there are few data about the trend of medicines against Crohn's disease around surgery in Koreans. This study was designed to investigate the association between medicines and surgery in patients with Crohn's disease retrospectively.

Methods

The Crohn's Disease Clinical Network and Cohort (CONNECT) retrospective cohort was used in this study. Between 1982 and 2010, patients with confirmed Crohn's disease were enrolled. The effect of azathioprine/6-mercaptopurine (6-MP) and TNF-alpha antagonist on abdominal surgery and perianal surgery were analyzed by the logistic regression analysis adjusting age, sex, location (L), and behavior (B).

Results

A total of 1376 patients (M: 973, F: 403) were selected, and 622 patients (abdominal surgery: 338, perianal surgery: 284). In 412 patients with abdominal surgery or no surgery, a multivariate analysis revealed that preoperative use of azathioprine/6-MP and TNF-alpha antagonist had an odds ratio of 0.225 (95% confidence interval [CI]: 0.127-0.398, P<0.0001) and 0.797 (95% CI: 397-1.599, P=0.522) for abdominal surgery, respectively. In 393 patients with perianal surgery or no surgery, a multivariate analysis azathioprine/6MP, and TNF-alpha antagonist, revealed that preoperative use of azathioprine/6-MP and TNF-alpha antagonist had an odds ratio of 0.148 (95% CI: 0.078-0.282, P<0.0001) and 0.239 (95% CI: 0.086-0.664, P=0.006) for perianal surgery, respectively.

Conclusion

Azathioprine/6-MP is significantly associated with a reduced risk of abdominal surgery and perianal surgery, and TNF-alpha antagonist is significantly associated with a reduced risk of perianal surgery in Crohn's disease.