Nonlinear association between hemoglobin glycation index and mortality in ischemic stroke Patients: Insights from the Medical Information Mart for Intensive Care IV (MIMIC-IV) database

Diabetes Res Clin PractPublished Retrospective cohort study

Authors' conclusion

Lower HGI is consistently related to poorer outcomes in patients with critical ischemic stroke. Higher HGI could be a protective factor in the short term but might increase mortality risk in the long term. WBC counts significantly mediate the association.

Study context

Population
Patients with critical ischemic stroke, MIMIC-IV database
Participants
2,332 patients
Exposure
Hemoglobin glycation index (HGI) groups
Outcome
In-hospital mortality across HGI groups
Methodological detailsMIMIC-IV database, restricted cubic splines, mediation analysis
  • MIMIC-IV database
  • Restricted cubic splines
  • Mediation analysis

Main finding

As reported in the abstract

In-hospital mortality differed significantly across HGI groups
P < 0.001

Observational data: associations, not effects.

Further findings

Nonlinear association of HGI with mortality

L-shaped association with short-term (30-day and in-hospital) mortality
Reverse J-shaped association with long-term (365-day) mortality

Mediation by white blood cell (WBC) counts

WBC counts mediated the association; proportions mediated (%)
33.73, 19.65, and 30.00

Original publication

Nonlinear association between hemoglobin glycation index and mortality in ischemic stroke Patients: Insights from the MIMIC-IV database. Diabetes Res Clin Pract. Published 15 March 2025. doi:10.1016/j.diabres.2025.112105

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