Table 2

Metabolite ratios in HIV infected patients and in neurological controls

Diagnosis (No)	NAA/Cr (mean (SD))	NAA/Cho (mean (SD))	Cho/Cr (mean (SD))
Neurological controls (22)	2.25 (0.51)	2.09 (0.51)	1.12 (0.26)
HIV-related encephalopathies (25)	1.78 (0.5)^*	1.47 (0.67)^*	1.34 (0.36)^*
HIV-toxoplasmosis (20)	1.47 (0.36)^* ^†	1.09 (0.56)^* ^†	1.61 (0.76)^*
HIV-lymphomas (7)	1.05 (0.86)^* ^† ^‡	0.48 (0.41)^* ^† ^‡	2.37 (1.86)^*
HIV-PML (8)	0.97 (0.28)^* ^† ^‡	0.83 (0.46)^* ^†	1.49 (0.9)

Comparison of means by Mann-Whitney U test: ^*different from neurological controls; ^† different from HIV-encephalopathies; ^‡ different from HIV-toxoplasmosis. Only the significant differences observed are presented; for statistic details see results.