Table 1.

eNOS-ir, VEGF-ir, MVD in astrocytic hyperplasia and astrocytoma

Grade	No.	eNOS-ir (%)	VEGF-ir (%)	MVD (mf−1)
H	4	0.00	0.00	8.25±1.71
LA	6	3.07±2.24*	4.43±2.33**	11.83±3.50
AA	12	31.35±19.17**	23.85±13.34**	20.87±4.57*
GBM	19	71.20±13.98**	58.63±15.02**	34.72±9.56**
Total	41	42.61±32.13	34.80±26.76	24.73±12.35

Note: Analyzed with Mann-Whitney tests

^*Compared with previous groups, P<0.05

^**Compared with previous groups, P<0.01

eNOS-ir: Labelling index of eNOS; VEGF-ir: Labelling index of VEGF; MVD: Microvascular density; H: Astrocytic hyperplasia; LA: Low-grade astrocytoma; AA: Anaplastic astrocytoma; GBM: Glioblastoma; mf⁻¹: per microscopic field