If you're worried about gallstones, a new study suggests paying attention to your metabolic health might be more important than you think. Researchers followed over 52,000 people without gallstones for an average of about three years. They tracked a score called METS-IR, which measures your body's resistance to insulin—a key hormone for managing blood sugar and metabolism. They found a surprising 'U-shaped' relationship between this score and gallstone risk. The risk was lowest when the METS-IR score was around 29.83. For people with scores below that point, each unit increase in the score was actually linked to a slightly lower risk of gallstones. But for people with scores above that point, each unit increase was linked to a higher risk. In fact, people in the highest-scoring group had nearly double the risk compared to those in the second-lowest group. The study found this pattern held true across different groups of people, making the finding robust. This means that for gallstone prevention, having a metabolic score that's too low or too high might both be problematic, pointing to a specific 'sweet spot' for metabolic health.
Could your body's insulin resistance score reveal your risk for gallstones? A new study finds a surprising U-shaped link.
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What this means for you:
Your metabolic health score has a U-shaped link to gallstone risk—being too high or too low is associated with higher risk. What this means for you:
Your metabolic health score has a U-shaped link to gallstone risk—being too high or too low is associated with higher risk. View Original Abstract ↓
BackgroundThe association between the Metabolic Score for Insulin Resistance (METS-IR) index and incident gallstone disease remains unclear. This study investigated this association using cohort data.MethodsA total of 52,723 participants without gallstone disease at baseline were included. Participants were stratified into five groups according to METS-IR quintiles. Multivariable Cox proportional hazards regression models were used to assess the association between METS-IR and the risk of developing gallstone disease. Restricted cubic spline (RCS) was employed to examine the dose-response relationship. Threshold effect analysis was subsequently conducted to identify potential inflection points. Additionally, subgroup and sensitivity analyses were performed to evaluate the robustness and reliability of the findings.ResultsOver a mean follow-up of 3.13 years, 1,407 incident cases of gallstone disease occurred. Compared to the Q2 group, the risk was significantly higher in Q3 (hazard ratio (HR)=1.29, 95% confidence interval (CI): 1.08–1.54), Q4 (HR = 1.50, 95% CI: 1.25–1.80), and Q5 (HR = 1.85, 95% CI: 1.53–2.25), but not in Q1 (HR = 1.12, 95% CI: 0.93–1.35). A nonlinear U-shaped association was identified, with an inflection point at a METS-IR of 29.83. Below this point, each unit increase in METS-IR was associated with a 2.7% lower risk (HR = 0.973, 95% CI: 0.956–0.991). Above it, each unit increase was associated with a 4.1% higher risk (HR = 1.041, 95% CI: 1.031–1.051). Subgroup and sensitivity analyses confirmed robustness.ConclusionsThe METS-IR exhibits a nonlinear U-shaped association with the risk of incident gallstone disease. Both lower and higher METS-IR levels, relative to the identified inflection point, are associated with an elevated risk of incident gallstone disease.