Key result
Higher triglyceride-glucose index is linked to ~62% greater MACE risk per unit after CABG.
Why the study?
The prognostic value of the triglyceride–glucose index as a surrogate marker of insulin resistance for adverse cardiovascular outcomes after CABG was unclear.
Does a higher triglyceride-glucose (TyG) index predict an increased risk of major adverse cardiovascular events in patients undergoing coronary artery bypass grafting?
Meta-Analysis (n=5,978)
Does a higher triglyceride-glucose (TyG) index predict an increased risk of major adverse cardiovascular events in patients undergoing coronary artery bypass grafting?
The TyG index is a significant independent predictor of major adverse cardiovascular events following CABG, suggesting its utility as an accessible metabolic risk marker.
Answers are grounded in this paper and cite their sources.
May aid post-CABG risk stratification as a metabolic marker; extends observational evidence on TyG prognostic value.
Aims To evaluate the prognostic value of the triglyceride–glucose index (TyG), a surrogate marker of insulin resistance, for adverse cardiovascular outcomes in patients undergoing coronary artery bypass grafting (CABG). Materials and methods This systematic review and meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies evaluating the association between the TyG index and postoperative outcomes after CABG were retrieved from four databases as of Jul 10, 2026. Multivariable-adjusted hazard ratios (HRs) with 95% confidence intervals (CIs) were used as the primary effect estimates for major adverse cardiovascular events (MACE), with separate analyses conducted for each 1-unit increase in the TyG index and for TyG index tertiles. Crude odds ratios (ORs) comparing the higher TyG group with the lower TyG group were estimated as a supplementary event-based analysis. Results Six retrospective cohort reports, comprising 5,978 participants and four independent cohort families, were included, with two being multi-center studies. Each 1-unit increase in the TyG index was associated with a 62.4% higher hazard of MACE (HR: 1.624, 95% CI: 1.349-1.955). Compared with the lowest tertile group, the highest tertile group demonstrated a statistically higher hazard of MACE (HR = 2.093, 95% CI: 1.635-2.680). A higher TyG index was associated with higher odds of MACE (OR: 2.59, 95% CI: 1.97-3.40). In addition, a higher TyG index was associated with an elevated risk of all-cause mortality, nonfatal stroke, and nonfatal myocardial infarction, but was not associated with revascularization. Conclusion The TyG index may serve as an accessible supplementary metabolic risk marker following CABG. Further prospective validation is required before it is routinely applied to individual risk prediction. Systematic Review Registration https://www.crd.york.ac.uk/PROSPERO/ , identifier CRD420251158075
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Zhang et al. (2026) conducted a meta-analysis in Coronary artery disease undergoing coronary artery bypass grafting (CABG) (n=5,978). Triglyceride-glucose (TyG) index vs. Lower TyG index was evaluated on Major adverse cardiovascular events (MACE) (HR 1.624, 95% CI 1.349-1.955, p=<0.001). Each 1-unit increase in the triglyceride-glucose index was associated with a 62.4% higher hazard of major adverse cardiovascular events (HR 1.624) following coronary artery bypass grafting.
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