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Association between red blood cell distribution width and prediabetes: evidence from a single center cohort study
Tuba Taslamacioglu Duman1, Burcin Meryem Atak Tel1, Satilmis Bilgin1
1Internal Medicine Department of Abant Izzet, Baysal University Hospital, Bolu, Turkey.
Insights
Red cell distribution width (RDW) is significantly higher in individuals with prediabetes compared to healthy controls. Elevated RDW is an independent predictor of prediabetes, suggesting its role in cardiometabolic health changes.
Area of Science:
- Hematology
- Endocrinology
- Internal Medicine
Background:
- Prediabetes is linked to chronic inflammation.
- Hemogram parameters like RDW and MPV are associated with inflammatory conditions.
Purpose of the Study:
- To compare hemogram parameters between prediabetes subjects and healthy volunteers.
- To investigate the association of RDW and MPV with prediabetes.
Main Methods:
- Retrospective analysis of 324 subjects (172 prediabetes, 152 controls).
- Comparison of median RDW and MPV between groups.
- Correlation analysis of RDW with FPG, HbA1c, triglyceride, and albumin.
- Regression analysis to identify independent predictors of prediabetes.
Main Results:
- Prediabetes group showed significantly higher median RDW (15.3%) compared to controls (14.75%).
- Prediabetes group had significantly lower median MPV (7.9 fL) than controls (8.59 fL).
- RDW, not MPV, correlated with FPG, HbA1c, triglyceride, and albumin.
- RDW was an independent predictor of prediabetes (OR: 1.6).
Conclusions:
- RDW is elevated in prediabetes and serves as an independent predictor.
- RDW may reflect cardiometabolic health alterations associated with prediabetes development.
Background:
Prediabetes is a condition characterized with chronic inflammation. Alterations in hemogram parameters, especially, red cell distribution width (RDW), and mean platelet volume (MPV) are associated with inflammatory diseases. In present study, we aimed to compare hemogram parameters of subjects with prediabetes to healthy volunteers.
Methods:
Patients with prediabetes were enrolled to the study who visited outpatient internal medicine clinics of our institution Hospital, between January 2023 and September 2025. Control subjects were healthy individuals who visited our clinics for a routine check-up. Hemogram parameters of prediabetes and control groups were compared.
Results:
Study cohort was consisted of 324 subjects; 172 in prediabetes and 152 in control group. Median RDW of the prediabetes group (15,3 (2,1)%) was significantly higher than the RDW of control subjects (14,75 (3,1)%), (p < 0.001). Median MPV of the patients with prediabetes (7,9 (2,4)fL), was significantly lower than that of the controls (8,59 (2,4)fL), (p = 0.01). RDW, but not MPV, was significantly correlated with FPG (r = 0.18, p = 0.001), HbA1c (r = 0.4, p < 0.001), triglyceride (r = 0.23, p < 0.001), and serum albumin (r = 0.5, p < 0.001). The sensitivity and specificity of RDW (when higher than 14.7%) in detecting prediabetes were 69% and 49%, respectively (AUC: 0.67, p < 0.001, 95%CI: 0.61-0.73). Regression analysis, considering RDW, age, triglyceride, FPG and BMI, revealed that RDW was an independent predictor of prediabetes (OR: 1.6, p < 0.001, 95%CI: 1.3-1.9).
Conclusions:
We suggest that RDW reflects certain changes in cardiometabolic health that occur in association with the development of prediabetes.
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