Improving Surgical Risk Prediction Through Integrating Automated Body Composition Analysis: a Retrospective Trial on Colectomy Surgery

• URL: http://arxiv.org/abs/2506.11996v3
• Date: Fri, 20 Jun 2025 16:07:27 GMT
• Title: Improving Surgical Risk Prediction Through Integrating Automated Body Composition Analysis: a Retrospective Trial on Colectomy Surgery
• Authors: Hanxue Gu, Yaqian Chen, Jisoo Lee, Diego Schaps, Regina Woody, Roy Colglazier, Maciej A. Mazurowski, Christopher Mantyh,
• Abstract summary: The primary outcome was the predictive performance for 1-year all-cause mortality following colectomy.<n> Secondary outcomes included postoperative complications, unplanned readmission, blood transfusion, and severe infection.
• Score: 3.424374887940227
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Objective: To evaluate whether preoperative body composition metrics automatically extracted from CT scans can predict postoperative outcomes after colectomy, either alone or combined with clinical variables or existing risk predictors. Main outcomes and measures: The primary outcome was the predictive performance for 1-year all-cause mortality following colectomy. A Cox proportional hazards model with 1-year follow-up was used, and performance was evaluated using the concordance index (C-index) and Integrated Brier Score (IBS). Secondary outcomes included postoperative complications, unplanned readmission, blood transfusion, and severe infection, assessed using AUC and Brier Score from logistic regression. Odds ratios (OR) described associations between individual CT-derived body composition metrics and outcomes. Over 300 features were extracted from preoperative CTs across multiple vertebral levels, including skeletal muscle area, density, fat areas, and inter-tissue metrics. NSQIP scores were available for all surgeries after 2012.

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