Table 1. ANOVA for different MRS peaks in different histological grades of astrocytoma.

Source of variables		Sum of squares	df	Mean square	F -Value	Sig. ( p -Value)
Ch peak of astrocytomas	Between groups	2218000000.00	2	1109000000	0.559	0.578
	Within groups	53600000000.00	27	1985000000
	Total	55820000000.00	29
NAA peak of astrocytomas	Between groups	768061963.886	2	384030981.943	0.368	0.696
	Within groups	28172889959.314	27	1043440368.863
	Total	28940951923.200	29
Cr peak of astrocytomas	Between groups	337190612.419	2	168595306.210	0.304	0.740
	Within groups	14969690715.048	27	554432989.446
	Total	15306881327.467	29
Ch–Cr ratio	Between groups	5.712	2	2.856	3.444	0.047
	Within groups	22.387	27	.829
	Total	28.099	29