Table 3.

Spearman rank correlational analysis of bone markers and CysC eGFR as well as FGF-23 for the group of all patients, group of <13 yrs and group of > 13 yrs of age

Correlations of CysC eGFR	Correlation coefficient	P-value	Correlations of FGF-23	Correlation coefficient	P-value
❖ All patients FGF-23	−0.4041	<0.0001	❖ All patients CysC eGFR	−0.4041	0.0002
CKD Stage	−0.8939	0.7688	CKD Stage	0.4574	< 0.0001
Calcium	0.0332	0.0090	Calcium	−0.2020	0.0705
Phosphate	−0.2887	0.0083	Phosphate	0.1791	0.1097
Ca*P	−0.2914	0.3484	Ca*P	0.1645	0.1422
25-OH Vit D	−0.1062	<0.0001	25-OH Vit D	0.0554	0.6253
125(OH)2 Vit D	0.5926	0.0241	125(OH)2 Vit D	−0.3455	0.0034
Alk Phosph	−0.2603	0.0002	Alk Phosph	−0.0858	0.4644
PTH	−0.5758	0.0002	PTH	0.3298	0.0039
ionized Ca	0.4278	<0.0001	ionized Ca	−0.3301	0.0049
❖ < 13 yrs			❖ < 13 yrs
FGF-23	−0.0798	0.6388	CysC eGFR	−0.0798	0.6388
CKD Stage	−0.8850	<0.0001	CKD Stage	0.1054	0.5348
Calcium	0.0684	0.6873	Calcium	−0.1727	0.3067
Phosphate	0.0649	0.7029	Phosphate	−0.0324	0.8490
Ca*P	0.0605	0.7221	Ca*P	−0.0440	0.7960
25-OH Vit D	−0.3134	0.0589	25-OH Vit D	0.1307	0.4405
125(OH)2 Vit D	0.4281	0.0163	125(OH)2 Vit D	0.1203	0.5193
Alk Phosph	−0.2764	0.1080	Alk Phosph	−0.1290	0.4602
PTH	−0.4727	0.0048	PTH	0.1235	0.4864
ionized Ca	0.4468	0.0081	ionized Ca	−0.2085	0.2366
❖ > 13 yrs			❖ > 13 yrs
FGF-23	−0.6330	<0.0001	CysCeGFR	−0.6330	<0.0001
CKD Stage	−0.8975	<0.0001	CKD Stage	0.7309	<0.0001
Calcium	0.0135	0.9305	Calcium	−0.1796	0.2435
Phosphate	−0.5558	<0.0001	Phosphate	0.5570	<0.0001
Ca*P	−0.5618	<0.0001	Ca*P	0.5343	<0.0001
25-OH Vit D	0.0400	0.7990	25-OH Vit D	0.0032	0.9835
125(OH)2 Vit D	0.6888	<0.0001	125(OH)2 Vit D	−0.6306	<0.0001
Alk Phosph	−0.4289	0.0058	Alk Phosph	0.2834	0.0764
PTH	−0.6071	<0.0001	PTH	0.4747	0.0017
ionized Ca	0.4592	0.0042	ionized Ca	−0.5034	0.0015