Low Vitamin D Levels and Genetic Polymorphism in the Vitamin D Receptor are Associated with Increased Risk of Statin-Induced Myopathy
2016
The main aim of this study was to test the hypothesis whether 25-hydroxyvitamin D (25OHD) levels 50 nmol/L (RR 4.2; 95% CI 1.7-10.2; p < 0.01). The mean levels of 25OHD at baseline were 50 ± 4 nmol/L among patients developing myopathy and 60 ± 2 nmol/L among patients without myopathy (p < 0.01). Individuals homozygous for the C allele in the VDR polymorphism TaqI (rs731236) had a four times higher risk of developing muscular symptoms; (RR 4.37, 95% CI 1.9-10.1, p < 0.01). In conclusion, 25OHD levels <50 nmol/L might be a useful marker to predict muscular adverse events during statin treatment. In addition, the finding that the VDR polymorphism TaqI was associated with myopathy may indicate a causal relationship between vitamin D function and myopathy, but larger studies are needed before firm conclusions can be drawn.
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