Table 3.

Comparison of HIF-1α and VEGF proteins between two groups of patients (n)

Group	Observation group (n=39)	Control group (n=39)	U	P
HIF-1α			2.111	0.035
-	17	25
+	12	11
++	8	2
+++	2	1
VEGF			2.035	0.048
-	2	4
+	13	16
++	14	18
+++	10	1

Note: VEGF: vascular endothelial growth factor; HIF-1α: hypoxia-inducible factor-1α.