Abstract
Introduction
Sarcopenia negatively impacts surgical outcomes in gastrointestinal cancer patients, yet practical preoperative screening tools are lacking. The CRP/ALB ratio, a novel biomarker of systemic inflammation and nutritional status, may enhance sarcopenia prediction but remains underexplored in surgical oncology. This study aims to identify the predictors for preoperative sarcopenia prediction in gastric and colorectal cancer patients.
Methods
This retrospective study analyzed 145 patients undergoing curative surgery (2019–2021). Sarcopenia was defined by sex-specific CT-measured L3 skeletal muscle index (cutoffs, male ≤ 40.8 cm2/m2; female ≤ 34.9 cm2/m2). Multivariable logistic regression identified predictors, with model performance assessed via ROC analysis and Cohen’s Kappa.
Results
The cohort (median age 64 years; 73.8% male) comprised 66 gastric (45.5%) and 79 colorectal (54.5%) cancer patients, with 29 (20%) diagnosed with sarcopenia. Sarcopenic patients exhibited a higher NRS 2002 score (P < 0.001), lower PNI score (P < 0.05), and higher CRP/ALB ratio (P < 0.05). Multivariate logistic regression analysis results showed that CRP/ALB ratio (OR = 3.084, 95% CI 1.071–8.882, P = 0.037), age (OR = 1.074, 95% CI 1.021–1.130, P = 0.006), and BMI (OR = 0.667, 95% CI 0.542–0.820, P = 0.000) were associated with the increased risk of sarcopenia. The combined model achieved superior discrimination (AUC = 0.854, 95% CI 0.770–0.937), yielding 75.86% sensitivity and 84.82% specificity at optimal cutoff value − 1.0340, and a Cohen’s Kappa coefficient of 0.542 when compared to CT results.
Conclusion
The CRP/ALB ratio combined with BMI and age is utilized as a convenient and effective tool for preoperative sarcopenia screening. This model-driven approach provides robust strategies to facilitate preoperative interventions, optimize perioperative care, and enhance long-term oncological outcomes for patients undergoing gastric and colorectal cancer surgery.


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Data Availability
No datasets were generated or analysed during the current study.
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Funding
The research was funded by the Nursing Research Fund of Jiangbei Campus, Nanjing Drum Tower Hospital (2023-B1611).
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Beijia Zhou contributed to the research design, data analysis and final writing; Tingting Tao and Yanjun Song contributed to the data collection and data analysis. Chen Chen and Xiaotian Chen was responsible for the manuscript revision. All authors have read and agreed to the published version of the manuscript.
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The study was approved by the Clinical Research Ethics Committee of Nanjing Drum Tower Hospital (2024–354-02).
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Zhou, B., Song, Y., Chen, C. et al. Preoperative Prediction of Sarcopenia in Patients Scheduled for Gastric and Colorectal Cancer Surgery. J Gastrointest Canc 56, 82 (2025). https://doi.org/10.1007/s12029-025-01206-y
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DOI: https://doi.org/10.1007/s12029-025-01206-y