Development and validation of a nutritional risk prediction model for patients with ulcerative colitis: a single-center retrospective study.

The decision to retain hemoglobin, despite a borderline significance level ( p = 0.065), was supported by sensitivity analysis confirming its consistent contribution to model performance across datasets, in addition to its well-established clinical relevance in reflecting the interplay of chronic blood loss, malabsorption, and nutritional status in UC 23 , 24 .

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