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Study: TyG:eGFRcr-cys Ratio Predicts Cardiovascular Disease Risk

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A new study suggests a combined marker of insulin resistance and kidney function may offer a powerful way to predict cardiovascular disease (CVD) risk.

The research, published in BIO Integration, focuses on the TyG:eGFRcr-cys ratio as a novel predictor for CVD. This marker simultaneously considers insulin resistance (via the TyG index) and kidney function (via eGFRcr-cys).

Key Study Details

The findings are based on a large-scale analysis:

  • Large Cohort: The prospective study included 261,865 participants from the UK Biobank.
  • Advanced Analysis: Researchers used Cox proportional hazards models to assess the link between the ratio and incident CVD.
  • Non-Linear Risk: A restricted cubic spline analysis was used to examine the complex, non-linear relationship between the ratio and disease risk.
  • External Validation: The results were validated using an independent cohort from the First Affiliated Hospital of Zhengzhou University (2018-2020) with up to 4 years of follow-up.

Major Findings

The data shows a clear and significant pattern of increased risk:

  • Gradual Risk Increase: After adjusting for other risk factors, the risk for total CVD increased steadily across higher quartiles of the TyG:eGFRcr-cys ratio (compared to the lowest quartile, Q1):

    • Q2: 1.15 (95% CI 1.10-1.21)
    • Q3: 1.17 (95% CI 1.12-1.23)
    • Q4: 1.24 (95% CI 1.18-1.30)

  • Dramatic Risk for Specific Outcomes: Each standard deviation increase in the ratio was linked to a substantially higher risk:

    • Total CVD: Hazard Ratio (HR) 3.49 (95% CI 2.94-4.15)
    • Coronary Heart Disease: HR 3.50 (95% CI 2.92-4.20)
    • Stroke: HR 2.65 (95% CI 1.80-3.90)

  • Key Non-Linearity: The analysis confirmed a significant non-linear relationship (P < 0.001), meaning risk does not simply rise in a straight line with the ratio.

  • Demographic Variations: The associations were found to be more pronounced in White individuals and in females.

Conclusion & Implications

The TyG:eGFRcr-cys ratio may serve as an effective predictor for CVD risk, with risk increasing as the ratio increases. This single, easily calculated marker could offer a more integrated view of metabolic and renal health for assessing cardiovascular danger.