{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T09:48:21Z","timestamp":1793267301616,"version":"4.5.0"},"reference-count":35,"publisher":"American Medical Association (AMA)","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"<jats:sec id=\"ab-zoi251060-4\"><jats:title>Importance<\/jats:title><jats:p>Anastomotic leakage is a severe complication after colorectal surgery that can significantly affect clinical outcomes and patient prognosis. Although multiple risk factors for anastomotic leakage have been identified, predicting the incidence of anastomotic leakage remains difficult.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi251060-5\"><jats:title>Objective<\/jats:title><jats:p>To develop a machine learning predictive model that combines logits from different base models to predict the incidence of anastomotic leakage more accurately.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi251060-6\"><jats:title>Design, Setting, and Participants<\/jats:title><jats:p>This retrospective prognostic study was conducted across 13 centers in Europe and North America between January 1, 2012, and December 31, 2020, and with data from the European Society of Coloproctology (ESCP). The study population included patients 18 years or older who underwent colon resection with anastomosis and had a follow-up of at least 6 months. Patients with metastatic disease and insufficient follow-up were excluded. A total of 6079 patients from 13 centers across different countries were included in the analysis with an additional 3041 patients from the ESCP. Data analysis was conducted from October 2024 to January 2025.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi251060-7\"><jats:title>Exposure<\/jats:title><jats:p>Colon anastomosis for various reasons, including neoplasia, diverticulitis, ischemia, iatrogenic or traumatic perforation, or inflammatory bowel disease.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi251060-8\"><jats:title>Main Outcomes and Measures<\/jats:title><jats:p>The primary outcome of this study was to predict anastomotic leakage using a cross-attention\u2013based meta-model, which integrated predictions from base models and patient-level clinical features. The F1 score was used to assess the prediction performance of the models.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi251060-9\"><jats:title>Results<\/jats:title><jats:p>A total of 9120 patients (mean [SD] age, 61.26 [15.71] years; 4636 [50.8%] male) from the 513 centers and the ESCP were included in the analysis. There was no difference in distribution between the 13 centers and the ESCP dataset. The model\u2019s predictive performance achieved overall F1 scores of 87% (95% CI, 78%-95%) and 70% across tests using a cross-validation process and external validation test set, respectively. The meta-model\u2019s performance was better than that of its component parts (eg, CatBoost: cross-validation F1 score, 87% [95% CI, 78%-95%]; external validation F1 score, 70%).<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi251060-10\"><jats:title>Conclusions and Relevance<\/jats:title><jats:p>In this prognostic study of patients who underwent colon resection with anastomosis, a meta-model was found to improve predictive accuracy. Additional prospective studies are needed to assess the clinical utility of the model in real-time settings and its integration into surgical workflows.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2025.38267","type":"journal-article","created":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T15:31:02Z","timestamp":1760974262000},"page":"e2538267","source":"Crossref","is-referenced-by-count":17,"title":["Development of a Clinical Prediction Model for Anastomotic Leakage in Colorectal Surgery"],"prefix":"10.1001","volume":"8","author":[{"given":"Vincent","family":"Ochs","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering, Faculty of Medicine, University of Basel, Allschwil, Basel, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephanie","family":"Taha-Mehlitz","sequence":"additional","affiliation":[{"name":"Clarunis, University Center for Gastrointestinal and Liver Diseases, St Clara Hospital and University 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