Table 2.

T-test results, determining whether mean values of ratios are significantly different between groups, for re-optimising the classification scheme for cerebellar tumours based on spectra from scanner software

	P-value
Ratio	Pilocytic astrocytoma vs. other	Medulloblastoma vs. ependymoma
Cr/tCho	0.785	0.005
NAA/tCho	<0.001	0.019
mIns/tCho	0.272	<0.001
NAA/Cr	<0.001	0.212
mIns/Cr	0.330	0.075
mIns/NAA	<0.001	0.013
LMM 0.9/tCho	0.015	0.184
LMM 1.3/tCho	0.436	0.296
LMM 0.9/LMM 1.3	0.044	0.621

Cr creatine, LMM lipids and macromolecules, mIns myo-insoitol, NAA N-acetyl aspartate, tCho total choline