. Author manuscript; available in PMC: 2013 May 1.

Published in final edited form as: Kidney Int. 2012 Jun 27;82(10):1061–1070. doi: 10.1038/ki.2012.222

Table 3.

Serum biochemical parameters in patients grouped by eGFR.

	eGFR ≥ 60 (ml/min/1.73 m²) (n = 14)	eGFR < 60 (ml/min/1.73 m²) (n = 14)	P value
African American (%)	55	44	0.6946
Diabetes mellitus (%)	42	42	1
Age (years)	62.57 ± 6.46	65.71 ± 8.49	0.1587
eGFR (ml/min/1.73 m²)	85.97 ± 14.66	35.65 ± 6.4	<0.0001
BMI (kg/m²)	30.64 ± 5.54	28.88 ± 5.87	0.4229
Urine ACR (mg/g)	0.13 ± 0.16	1.79 ± 2.37	0.0093
Serum FGF23 (pg/ml)	80.92 ± 35.42	152 ± 34.81	<0.0001
Serum 25(OH)D (ng/ml)	11.6 ± 4	14.6 ± 5	0.0677
Serum 1,25(OH)₂D (pg/ml)	44 ± 19	43 ± 19	0.8329
Serum 24,25(OH)₂D (ng/ml)	1.24 ± 1	0.65 ± 0.5	0.0683
Serum PTH (pg/ml)	58 ± 28	167 ± 117	0.0007
Serum alkaline phosphatase (IU/L)	84.71 ± 25.71	95.57 ± 23.94	0.7304
Fractional excretion of calcium	0.69 ± 0.65	1.15 ± 1.85	0.2140
Fractional excretion of PO₄	12.26 ± 4.03	29.92 ± 8.63	<0.0001

Categorical variables are presented as percentage and continuous variables as mean ± SD. Fisher’s exact test was used for the variable African American, Chi-square test for the variable DM. Unpaired t-test was used for the variables FGF-23, serum 25(OH)D, and BMI, Mann–Whitney U test was used for the rest of the continuous variables. eGFR, estimated glomerular filtration rate; BMI, body mass index; ACR, albumin creatinine ratio; FGF-23, fibroblast growth factor-23; 25(OH)D, 25-hydroxyvitamin D; 1,25(OH)₂D, 1,25-dihydroxyvitamin D; 24,25(OH)₂D, 24,25-dihydroxyvitamin D; PTH, parathyroid hormone, PO₄; phosphorous.