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Vitamin-D Deficiency Linked to Fatal CVD

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Vitamin-D deficiency is much more strongly linked to fatal than nonfatal CV events, results of a large prospective study suggest. “Although our results were able to confirm an approximately 27% increased total CV risk in subjects with vitamin D deficiency, they indicate that the risk is much stronger for (and possibly even confined to) fatal CVD events,” write the researchers. Previous observational and randomized trials linking serum 25-hydroxyvitamin D (25(OH)D) concentrations with increased CVD risk have typically used only a single vitamin-D measurement and did not separately examine fatal and nonfatal outcomes, they note. The current population-based cohort study enrolled 9949 adults aged 50 to 74 years recruited during regular health checkups at primary-care practices in 2000 to 2002. There were more women than men (59% vs 41%); most participants (59%) had inadequate vitamin-D levels (<50 nmol/L). Blood samples were collected at baseline, 5, and 8 years. Mean follow-up was 9.2 years for mortality and 6.5 years for the end points of CVD, CHD, and stroke. A total of 854 patients had a nonfatal CVD event, 176 had a fatal CVD event, 460 had a nonfatal CHD event, 79 had a fatal CHD event, 313 had a nonfatal stroke, and 41 had a fatal stroke. Overall, the proportion of individuals who had no events was significantly lower among those with vitamin-D deficiency. The association continued after adjustment for age, sex, and season of blood drawn, with hazard ratios ranging from 1.46 for total CVD to 1.58 for total stroke.

Source: MedScape

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