Association Between the Atherogenic Index of Plasma and Abdominal Aortic Calcification in Adults: a Cross-Sectional Study

Abstract Background Atherogenic index of plasma (AIP) index is an important marker of insulin resistance and a significant risk factor for cardiovascular disease. Abdominal aortic calcification (AAC) is significantly associated with subclinical atherosclerotic disease. However, there are no studies that have examined the relationship between AIP index and AAC, so we investigated the potential association between them in the general population. Methods This was a cross-sectional study using data from the National Health and Nutrition Examination Survey (NHANES, 2013–2014). The association of AIP with AAC was estimated by multivariable regression analysis. Results After adjusting for confounders, the odds of extensive AAC doubled per unit increase in the AIP index (OR = 2.00, 95% CI: 1.05, 3.83; P = 0.035). The multivariable OR and 95% CI of the highest AIP index tertile compared with the lowest tertile was significantly different. (OR = 1.73, 95% CI: 1.05, 2.83; P = 0.031). The subgroup analyses indicated that the association was consistent irrespective of age, sex, hypertension, diabetes, smoking status, eGFR and hypercholesteremia. Conclusions The AIP index was independently associated with the presence of extensive AAC in the study population. Further studies are required to confirm this relationship.