Egyptian Liver Journal

Table 3 Comparative statistics of GDF-15 between control group and whole patients’ group and between each two patients’ sub-groups using Wilcoxon’s rank sum test

From: Growth differentiation factor 15: an emerging diagnostic biomarker of liver fibrosis in chronic hepatitis C patients

Group	Control (n = 30)		Patient group (n = 55)		Wilcoxon rank sum test
Parameter	Median	Q1–Q3٭	Median	Q1–Q3٭	Z	p value
GDF-15 (ng/L)	110	100–120	410	300–530	− 7.442	0
Group	Control (n = 30)		Patient subgroup I (n = 18)		Wilcoxon rank sum test
Parameter	Median	Q1–Q3٭	Median	Q1–Q3٭	Z	p value
GDF-15 (ng/L)	110	100–120	340	220–500	− 5.753	0
Group	Subgroup І F0–F1 (n = 18)		Subgroup II F2 (n = 13)		Wilcoxon rank sum test
Parameter	Median	Q1–Q3٭	Median	Q1–Q3٭	Z	p value
GDF-15 (ng/L)	340	220–500	500	405–510	− 1.834	0.067
Group	Subgroup І F0–F1 (n = 18)		Subgroup III F3–F4 (n = 24)		Wilcoxon rank sum test
Parameter	Median	Q1–Q3٭	Median	Q1–Q3٭	Z	p value
GDF-15 (ng/L)	340	220–500	415	335–587.5	− 2.065	0.039
Group	Subgroup II F2 (n = 13)		Subgroup III F3–F4 (n = 24)		Wilcoxon rank sum test
Parameter	Median	Q1–Q3٭	Median	Q1–Q3٭	Z	p value
GDF-15 (ng/L)	500	405–510	415	335–587.5	− 0.08	0.936

Q1–Q3* = Interquartile range (25th–75th percentiles) p value > 0.05 is non-significant, p value < 0.01 is highly significant

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