The triglyceride-glucose (TyG) index, a simple marker derived from fasting blood tests, shows a statistically significant correlation with diastolic blood pressure in patients with type 2 diabetes mellitus (T2DM), according to a study published in the Cureus Journal of Medical Science. While the index is linked to insulin resistance, researchers found it does not share a similar correlation with systolic blood pressure.
Metabolic Markers and Diastolic Pressure
In a cross-sectional study of 219 patients at a tertiary care hospital in North Kerala, India, researchers Mitha K V, Smruthi V, and Pibini Paul observed that the TyG index acts as a surrogate for insulin resistance. The data, published September 28, 2026, revealed a mean TyG index of 10.10 ± 0.44 among the participants. Statistical analysis using Pearson’s correlation demonstrated a positive association between the TyG index and diastolic blood pressure (r = 0.149, p = 0.027). In contrast, no significant relationship was identified between the index and systolic blood pressure (r = 0.035, p = 0.612).
Clinical Implications of Insulin Resistance
The researchers noted that while the TyG index could provide complementary insights for identifying diabetic patients at risk for diastolic hypertension, the association found in this cohort was modest. Multiple linear regression analysis, adjusted for age, gender, and body mass index, confirmed the independent association with diastolic blood pressure (B = 3.52, p = 0.047).
Comparative Research on Cardiac Function
The investigation into the TyG index extends to broader cardiovascular health concerns in diabetic patients. Both the Cureus study and other findings highlight the index as a tool for identifying metabolic dysfunction, though the researchers emphasize that larger, prospective studies are required to establish its utility in long-term clinical risk stratification.
Methodological Considerations
The Cureus study relied on a consecutive sampling method, including 149 males and 70 females with T2DM.
Calculating and using the triglyceride-glucose index
What is the TyG index?
The triglyceride-glucose (TyG) index is a mathematical surrogate for insulin resistance. It is calculated using a patient’s fasting triglyceride levels and fasting plasma glucose levels.
Why is the TyG index studied in diabetic patients?
Because insulin resistance is a key mechanism linking type 2 diabetes to cardiovascular complications, researchers look for simple, cost-effective markers like the TyG index to help identify patients at higher risk for conditions such as hypertension.
Does the TyG index predict systolic blood pressure?
In the study of 219 T2DM patients published in Cureus, the TyG index showed no significant correlation with systolic blood pressure, showing an association only with diastolic blood pressure.
Is the TyG index a replacement for standard testing?
No. While the index is a useful research tool for identifying metabolic trends, the authors of the Cureus study emphasize that its current predictive utility is limited and that it should be used to provide complementary insights rather than as a standalone diagnostic tool.
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