Fig. 4

Vitamin D 1A hydroxylase (CYP27B1) gene expression in muscle tissue correlates with VDR (A, E), muscle strength assessed by MMT-8 (B), and indicators of muscle damage/dysfunction (C, D, F) in myositis patients and healthy controls (baseline levels). The bivariate relationships between variables were assessed using the Spearman correlation coefficient. MMT-8, manual muscle testing of 8 muscles