. Author manuscript; available in PMC: 2009 Jul 27.

Published in final edited form as: Kidney Int. 2008 Sep 17;75(2):176–184. doi: 10.1038/ki.2008.456

Table 4. Comparison of impact of diets in 20 week animals.

	Cy/+ CKD Animals		P value
	Casein (n = 15)	Grain (n = 9)
Serum:
Calcium (mg/dl)	9.6 ± 0.4	8.8 ± 0.3	NS
Phosphorus (mg/dl)	5.4 ± 0.2	5.4 ± 0.3	NS
Intact PTH (pg/ml) (Median 25/75%)	469 ± 87	347 ± 56	NS
FGF23 (pg/ml) (Median 25/75%)	1254 (1183-1411)	869 (799-903)	< 0.001
Urine:
FE phosphorus (%) (Median 25/75%)	80.1 (67.2-116.7	24.2 (21.0-49.3)	< 0.001
Phosphorus (mg/24 hr) (Median 25/75%)	76.3 (58.3-87.8)	44.3 (39.4-49.0)	< 0.001
Calcium/creatinine Ratio (mg/mg)	0.21 ± 0.02	0.12 ± 0.02	0.013
Calcium (mg/24 hrs)	3.2 ± 1.1	2.9 ± 1.2	NS
Stool:
Calcium (mg/24 hrs)	49.7 (38.9-44.8)	74.0 (54.3-78.7)	NS
Phosphate (mg/24 hrs)	33.1 (18.4-44.8)	30.6 (12.4-44.3)	NS

FE = fractional excretion; Mean ± SEM unless otherwise indicated