Independent effects of the hemoglobin-to-red blood cell distribution width ratio on 180-day mortality in critically ill patients with Gastrointestinal bleeding: analysis from the MIMIC-IV database

CONCLUSION: HRR exhibits a significant nonlinear negative association with 180-day mortality in critically ill patients with GIB. This association was consistent across multiple subgroups, suggesting that HRR may serve as a simple and effective prognostic biomarker in patients with GIB.