FGF21 and chronic kidney disease: Plasma FGF21 levels in CKD patients with LVH (median 923.9 pg/ml, interquartile 363.7 to 1478.7 pg/ml) were significantly higher than those without LVH (median 446.5 pg/ml, interquartile 245.6 to 953.1 pg/ml; P = 0.001; Figure 2A).