Abstract

The cardiometabolic implications of Non-Functioning Adrenal Incidentaloma (NFAI) is still matter of debate. This study takes a novel approach to analyze this association, accounting for the influence of various confounding factors. We present the findings of a retrospective, cross-sectional, and case-control study. Data from all NFAI patients in primary prevention, referred to the University of Turin between 2000 and 2023, were collected and compared with subjects without adrenal disease, using propensity score matching analysis. A total of 1997 patients were included (906 patients with NFAI; 1091 controls). Adrenal tumor group was associated with high levels of cardiovascular risk scores in both univariate and multiple linear regression analyses (Progetto CUORE: EC 11.00, 95% CI 2.72-44.46, p = 0.001; SCORE: EC 1.97, 95% CI 1.01-3.81, p = 0.046). Regarding cardiometabolic complications, multivariable logistic regression revealed an independent association between NFAI and ascending aorta dilation (OR 4.64, 95% CI 2.24-9.63, p = 0.000), after adjusting for age, sex, smoking status, metabolic syndrome, number of antihypertensive drugs, estimated glomerular filtration rate (eGFR), and normetanephrine levels. Propensity score matching analysis (1:1 matching ratio), based on the same logistic regression model, confirmed the association of NFAI with aortic dilation (β = 0.083, 95% CI 0.008-0.157, p = 0.030). No significant associations were found with metabolic syndrome, type II diabetes, eGFR <60 mL/min/1.73 m2, microalbuminuria, atrial fibrillation, or hypertensive heart disease. This study suggests that patients with NFAI face increased cardiometabolic risk and high prevalence of ascending aorta dilation. Routine evaluation of NFAI patients should include thorough cardiovascular assessment and consideration of treatments aimed at reducing cardiovascular risk.

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