Table 1.

Fasting laboratory results in the healthy and CKD groupsa

ParameterMeal 1Meal 2
Healthy (n = 21)CKD (n = 13)PHealthy (n = 11)CKD (n = 10)P
Serum creatinine (mg/dl)0.9 ± 0.11.8 ± 0.3<0.010.9 ± 0.11.8 ± 0.3<0.01
Serum phosphorus (mg/dl)3.1 ± 0.53.1 ± 0.6NS3.2 ± 0.63.0 ± 0.6NS
Serum calcium (mg/dl)9.2 ± 0.39.3 ± 0.3NS9.2 ± 0.49.2 ± 0.3NS
Fractional excretion phosphorus (%)16 ± 730 ± 9<0.0116 ± 829 ± 10<0.01
Fractional excretion calcium (%)0.9 (0.7 to 1.3)0.5 (0.2 to 0.7)<0.010.9 (0.8 to 1.8)0.5 (0.2 to 0.8)0.02
PTH (pg/ml)30 ± 1438 ± 19NS25 ± 629 ± 17NS
FGF-23 (pg/ml)52 ± 2484 ± 24<0.0150 ± 2178 ± 20<0.01
25D (ng/ml)39 ± 935 ± 8NS
1,25D (pg/ml)41 ± 1124 ± 10<0.01
  • a Data are means ± SD for normally distributed variables and median (interquartile range) for variables with skewed distributions.