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Random blood glucose: a robust risk factor for type 2 diabetes
Michael E Bowen1, Lei Xuan, Ildiko Lingvay
1Division of General Internal Medicine, Department of Medicine (M.E.B., E.A.H.), Division of Outcomes and Health Services Research, Department of Clinical Sciences (M.E.B., L.X., E.A.H.), Division of Endocrinology, Department of Medicine (I.L.), and Department of Clinical Sciences (I.L.), University of Texas Southwestern Medical Center, Dallas, Texas 75390.
The Journal of Clinical Endocrinology and Metabolism
|February 5, 2015
Summary
Elevated random blood glucose (RBG) levels, even if not diagnostic, significantly increase the risk of developing type 2 diabetes. These findings suggest RBG should be considered in future diabetes screening guidelines.
Area of Science:
- Endocrinology
- Public Health
- Clinical Diagnostics
Background:
- Random blood glucose (RBG) measurements are frequently used in clinical settings.
- The predictive value of non-diagnostic elevated RBG for type 2 diabetes risk is not well established.
Purpose of the Study:
- To investigate nondiagnostic random blood glucose values as a risk factor for type 2 diabetes.
- To compare the efficacy of RBG screening with current diabetes screening guidelines.
Main Methods:
- Cross-sectional analysis of 13,792 nonfasting National Health and Nutrition Examination Surveys (NHANES) participants (2005-2010) without diagnosed diabetes.
- Glycemic status determined by hemoglobin HbA1C; multinomial logistic regression used to assess associations between risk factors, RBG, and glycemic status.
Main Results:
- A single RBG ≥ 100 mg/dL showed a stronger association with undiagnosed diabetes (OR, 20.4) than traditional risk factors, even after adjustment.
- Increased RBG levels correlated with significantly higher odds of undiagnosed diabetes (e.g., OR 30.3 for 120-139 mg/dL).
- Hypothetical RBG screening demonstrated stronger association with undiagnosed diabetes compared to USPSTF guidelines and was comparable to ADA guidelines.
Conclusions:
- Elevated random blood glucose (≥ 100 mg/dL) is a significant risk factor for undiagnosed type 2 diabetes, surpassing traditional risk factors.
- Abnormal RBG values warrant consideration for inclusion in future diabetes screening strategies and guidelines.
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