. 2016 Jun 7;27(3):976–984. doi: 10.1007/s00330-016-4454-8

Table 3.

Incidence of elevated MRS lactate, MRS L/Cr ratio, CSF lactate values and venous lactate values

MRS values	Definite	Probable	Possible	Unlikely
MRS values	(n = 17)	(n = 10)	(n = 17)	(n = 44)
MRS lactate	4 (24 %)^a	3 (30 %)	1 (6 %)	0 (0 %)
>12
MRS L/Cr ratio	9 (53 %)^b	5 (50 %)^c	7 (41 %)	3 (7 %)
>0.22
CSF values	Definite	Probable	Possible	Unlikely
CSF values	(n = 12)	(n = 9)	(n =15)	(n = 25)
CSF lactate	4 (33 %)	2 (22 %)	1(7 %)	2 (8 %)
>1,9 mmol/l
Serum values	Definite	Probable	Possible	Unlikely
Serum values	(n = 17)	(n = 10)	(n = 17)	(n = 44)
Venous lactate	9 (53 %)^d	3 (30 %)	6 (35 %)^e	10 (23 %)
>2.2 mmol/l

MRS, magnetic resonance spectroscopy; L/Cr, lactate/creatine; CSF, cerebral spinal fluid. Significant differences between groups: ^adefinite vs.unlikely, p = 0.015, ^bdefinite vs. unlikely, p = 0.001,, ^cprobable vs. unlikely, p = 0.03, ^ddefinite vs. unlikely, p < 0.001, ^fepossible vs. unlikely, p = 0.04