Table 6. Kruskal-Wallis ANOVA rank for serum VEGF-A concentration [pg/ml] before surgery and tumor type, Kruskal-Wallis test: H (3, N = 48) = 1.047748 p = .7897.

Type of tumor (by 5 general groups)	N—valid	Rank
Metastatic tumors	6	119.0
Meningiomas	9	221.5
Other	3	64.0
LGG	7	196.5
HGG	23	575.0

LGG, low grade gliomas; HGG, high grade gliomas.