Table 5:

Correlation between tracer uptake and proliferation index

Variable	Tumor	Mib-1 LI
Variable	Tumor	P	r
MET	Astrocytic tumor	<.001	0.64
	Oligodendroglial tumor	.63	−0.13
	Oligoastrocytic tumor	.84	0.05
	All tumor	<.01	0.31
FDG	Astrocytic tumor	<.001	0.71
	Oligodendroglial tumor	.27	0.29
	Oligoastrocytic tumor	.78	−0.07
	All tumor	<.001	0.42
CHO	Astrocytic tumor	<.001	0.64
	Oligodendroglial tumor	.67	0.11
	Oligoastrocytic tumor	.44	0.19
	All tumor	<.001	0.42

Note:—Proliferation index was measured by Mib-1 labeling index; MET indicates ¹¹C-methionine; FDG, [¹⁸F] fluorodeoxyglucose; CHO, ¹¹C-choline; LI, labeling index. P and r values were calculated by using Spearman correlation coefficients.