Background: Total proctocolectomy (TPC) with ileal pouch-anal anastomosis (IPAA) has been accepted as a radical surgery for refractory ulcerative colitis (UC). We aimed to assess the predictive value of several novel and widely used endoscopic core systems, The Toronto IBD Global Endoscopic Reporting (TIGER) score, Mayo endoscopic score (MES), and ulcerative colitis endoscopic index of severity (UCEIS) in guiding the need for IPAA.
Methods: Data on patients with UC from June 1986 and June 2022 at our institute were collected. The endoscopic evaluation was recorded according to the first colonoscopy after hospitalization. Primary outcome was the need for IPAA during admission and follow-up.
Results: A total of 313 patients with a median follow-up time and a median TIGER score of 12.0 years (interquartile range (IQR): 6.0-17.0) and 212.0 (IQR: 7.0-327.0) were enrolled. IPAA was conducted in 110 (35.1%) patients, which significantly improved the long-term quality of life. TIGER score had the biggest area under the receiver-operating characteristic curve of 0.810 with a sensitivity of 75.0% and specificity of 87.1% at the cut-off value of 315 (p < 0.001). TIGER score ≥ 315 was an independent risk factor with the highest odds ratio for the need for IPAA and associated with the shortest IPAA-free survival time compared with UCEIS and MES.
Conclusion: TIGER score was superior to UCEIS and MES in predicting the need for IPAA. For colorectal surgeons, three or more segments with moderate-to-severe endoscopic activity should be considered as a threshold value for decision-making for IPAA.
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