BACKGROUND AND AIM: Evidence from prospective cohort studies has revealed an inverse association between cheese consumption and the development of atherosclerosis (AS), atherosclerotic cardiovascular diseases (ASCVD), and their complications. However, it remains unclear whether this observed association is influenced by potential confounding factors that may arise during the long-term development process of AS, ASCVD, and its complications. Therefore, to further clarify the causal relationship between cheese consumption and AS, ASCVD, and its complications, we conducted a two-sample Mendelian randomization (MR) analysis to explore the causal association between cheese intake and the aforementioned health outcomes.
METHODS AND RESULTS: We employed a two-sample MR analysis based on publicly available genome-wide association studies (GWAS) to infer the causal relationship, with no overlap between their participating populations. The effect estimates were calculated using the random-effects inverse-variance-weighted method. Sensitivity analyses were conducted using Cochran's Q statistic, funnel plot, leave-one-out analysis, and MR-Egger intercept tests. The genetically predicted cheese intake was found to be associated with lower risks of coronary AS (odds ratio [OR] = 0.72, 95 % confidence interval [CI] 0.59-0.88, P = 0.001), peripheral vascular AS (OR = 0.56, 95 % CI 0.37-0.84, P = 0.006), other vascular AS (OR = 0.66, 95 % CI 0.44-0.99, P = 0.043), coronary artery disease (OR = 0.64, 95 % CI 0.56-0.74, P = 1.57e-09), angina pectoris (OR = 0.70, 95 % CI 0.58-0.84, P = 4.92e-05), myocardial infarction (OR = 0.63, 95 % CI 0.52-0.77, P = 3.56e-06), heart failure (OR = 0.62, 0.49-0.79, P = 1.20e-04), total ischemic stroke (OR = 0.76, 95 % CI 0.63-0.91, P = 0.003), peripheral artery disease (OR = 0.64, 95 % CI 0.43-0.95, P = 0.028), and cognitive impairment (OR = 0.65, 95 % CI 0.56-0.74, P = 3.40e-10). However, no associations were observed for cerebrovascular AS, arrhythmia, cardiac death, ischemic stroke (large artery AS), ischemic stroke (small vessel), ischemic stroke (cardioembolic), and transient ischemic attack.
CONCLUSION: This two-sample MR analysis reveals a causally inverse association between cheese intake and multi-vascular AS (including coronary AS, peripheral vascular AS, and other vascular AS), as well as multiple types of ASCVD and its complications (such as coronary artery disease, angina pectoris, myocardial infarction, heart failure, total ischemic stroke, and peripheral artery disease). The findings from this study may lay a stronger theoretical foundation and present new opportunities for the dietary management of future atherosclerotic cardiovascular diseases.
