Abstract
AIMS: To assess the associations between dietary magnesium intake and mortality from all-cause, cardiovascular disease (CVD) and kidney disease (KD) among participants with diabetes mellitus (DM).</p>
METHODS: The study covered 6004 adults with DM from the National Health and Nutrition Examination Survey (US NHANES) and 10,130 adults with DM from the UK Biobank. We employed Cox regression models and restricted cubic spline models to evaluate relationships between daily dietary magnesium intake and mortality from all-cause, CVD and KD.</p>
RESULTS: We documented 1442 deaths in the US NHANES and 651 deaths in the UK Biobank, respectively. When comparing the highest versus the lowest quartile of dietary magnesium intake, the adjusted hazard ratios (HR) were 0.62 (95% CI 0.50-0.78), 0.54 (95% CI 0.37-0.80) and 0.22 (95% CI 0.06-0.82) for all-cause mortality, CVD mortality and KD mortality in the US NHANES, respectively. Similarly, the adjusted HR were 0.71 (95% CI 0.57-0.88) and 0.65 (95% CI 0.43-0.98) for all-cause mortality and CVD mortality in the UK Biobank. The dietary magnesium intake exhibited a significant non-linear 'L-shaped' relationship with all-cause mortality rates in both cohorts and CVD mortality rates in the UK cohort (all p for non-linearity <0.05).</p>
CONCLUSIONS: Higher dietary magnesium intake was consistently associated with reduced risks of all-cause, CVD and KD mortality in US adults with DM and with lower all-cause and CVD mortality in UK adults with DM. These findings highlight the potential prognostic benefit of dietary magnesium intake in DM management.</p>