FGF23 and chronic kidney disease: In addition CKD patients have significantly higher FGF23 (235 ± 22.96 vs. 139 ± 12.3 pg/mL, p < .001), PTH (76.9 ± 15.27 vs. 47.9 ± 2.52 pg/mL, p < .001), P (4.3 ± 0.67 vs. 3.6 ± 0.23 mg/dL, p < .001), and UA (5 ± 1.22 vs. 4.85 ± 0.48 mg/dL, p < .001) and significantly lower Ca (8.2 ± 0.3 vs. 8.9 ± 0.33 mg/dL, p < .001), and 25 (OH) vit D (17 ± 5.63 vs. 37 ± 3.43 ng/mL, p < .001).