Table 3.

Correlation between GDF15, hepcidin, and erythroferrone with different studied parameters.

	GDF15 (ng/ml)		Hepcidin		Erythroferrone
	R	P value	R	P value	R	P value
GDF15 (ng/ml)	–	–	−0.574	<0.001	0.493	<0.001
Hepcidin (ng/ml)	−0.574	<0.001	–	–	−0.362	0.004
Erythroferrone (ng/ml)	0.493	<0.001	−0.362	0.004	–	–
HbA %	−0.080	0.540	0.203	0.117	−0.071	0.588
HbA2 %	0.049	0.708	−0.003	0.985	0.059	0.652
HbF %	0.047	0.717	−0.169	0.192	0.023	0.859
Hb (g/dl)	−0.955**	<0.001	0.535**	<0.001	−0.410**	0.001
Platelet count (103/cmm)	0.168	0.195	−0.210	0.105	−0.133	0.306
TLC (103/cmm)	0.052	0.688	−0.184	0.156	0.005	0.968
Reticulocytes (%)	0.940	<0.001	−0.593	<0.001	0.453	<0.001
LDH level (U/I)	0.952	<0.001	−0.533	<0.001	0.440	<0.001
Serum ferritin (ng/ml)	0.950	<0.001	−0.616**	<0.001	0.526	<0.001
Serum Ca (mg/dl)	0.038	0.772	−0.079	0.547	0.023	0.860
Serum PO4 (mg/dl)	0.047	0.722	−0.134	0.302	0.114	0.381
ALP (U/l)	−0.344	0.007	0.152	0.242	−0.162	0.213

Hb hemoglobin, TLC total leukocyte count, LDH lactate dehydrogenase, Ca calcium, PO₄ phosphate, ALP alkaline phosphatase.

Statistically significant values are in bold.