A retrospective study on influencing factors of postoperative hospital stay and development of a predictive scoring model for elderly patients (≥70 years) with colorectal cancer undergoing laparoscopic radical resection.

For variables with marginal significance (0.05 < P < 0.1) in multivariate analysis (i.e., comorbidity count ≥2 types, operative time >180 min), we retained them in the final model based on two criteria: (1) clinical plausibility—previous studies have confirmed that multimorbidity (≥2 comorbidities) increases physiological stress in elderl

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Medium-risk factors (1 point each): Presence of ≥2 comorbidities: With a β -coefficient of 1.172 ( P = 0.095), this factor exerted a marginally significant effect.

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