a statistical trendP =0.07
The rise in cFGF23 between 50 weeks and baseline assessed by contrast analysis was significant in the EPO hemoglobin‐rise group ( P =0.03) and a statistical trend in the EPO hemoglobin‐stable group ( P =0.07), whereas the decline of cFGF23 levels in the control group was not significant ( P =0.53).