The magnesium depletion score (MDS) is considered a new valuable and reliable predictor of body magnesium status. This study aimed to explore the association between MDS and congestive heart failure (CHF) among US adults. A total of 19,227 eligible participants from the 2007-2016 National Health and Nutrition Examination Survey were enrolled in this study and then divided into three groups according to the level of MDS (none to low: MDS=0-1, middle: MDS=2, high: MDS=3-5). Sample-weighted logistic regression models were applied to calculate odds ratios (ORs) and 95% confidence intervals (CIs) exploring the independent relationship between MDS and CHF. The estimated prevalence of CHF increased with the increasing level of MDS (none to low: 0.86%, middle: 4.06%, high: 13.52%; P < 0.001). Compared to those in the none-to-low group, participants in the middle and high groups were at significantly higher risk of CHF after adjusting for various covariates (model 3: OR=1.55, 95%CI: 1.05-2.30, P < 0.001; OR=3.20, 95%CI: 2.07-4.96, P < 0.001; respectively). Subgroup analyses indicated that adequate dietary magnesium intake could reduce the risk of CHF in participants who did not meet the recommended dietary allowance (RDA) for magnesium. Besides, there was an interaction between coronary artery disease and MDS on CHF (P for interaction < 0.001). These findings indicated that MDS, a novel indicator estimating magnesium deficiency, is associated with the risk of CHF in non-institutionalized US civilians. Participants whose dietary magnesium intake reaches the RDA might be at lower risk.
Keywords: Congestive heart failure; Dietary magnesium intake; Magnesium depletion score; NHANES; Nutrition.
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