Only one (rs4149056/c.521C>T in the SLCO1B1 gene) SNP was genomewide significant in the severe myopathy (creatine kinase > 10 × upper limit of normal or rhabdomyolysis) group (P = 2.55 × 10−9; odds ratio 5.15; 95% confidence interval 3.13–8.45). This evidence concerns the gene SLCO1B1 and myopathy.