EPI!
The ROC curve analysis revealed that measurements of circulating forms (25OHD2 and 25OHD3) without the epimers cannot predict disease state.
The stark difference between the predictive power of the total circulating form (25OHD including 3-epi-25OHD) and the “pure” 25OHD concentration, again, clearly indicates the role of the epimers in distinguishing d…