TABLE 1.

Initial Concentrations and Linear Regression Results per Participant and Region for Test and Retest Measurement Bouts

Metabolite	Initial Concentrations, mM	Slopes, μM/min	Correlation Coefficient, r	P
Glx4
Test
Participant 1	11.5/8.6	−31.6/−23.3	−0.99/−0.98	<0.001/<0.001
Participant 2	13.3/9.6	−31.2/−20.4	−0.96/−0.97	<0.001/<0.001
Participant 3	12.8/9.6	−24.0/−15.1	−0.89/−0.86	<0.001/<0.001
Participant 4	13.0/9.5	−27.7/−17.3	−0.94/−0.87	<0.001/<0.001
Participant 5	11.9/8.4	−30.8/−21.9	−0.95/−0.95	<0.001/<0.001
Participant 6	12.3/8.9	−35.2/−19.8	−0.93/−0.96	<0.001/<0.001
Participant 7	12.7/9.0	−27.0/−14.1	−0.97/−0.92	<0.001/<0.001
Retest
Participant 1	11.2/8.2	−13.5/−11.6	−0.64/−0.72	0.014/0.003
Participant 2	11.8/8.7	−25.2/−14.9	−0.93/−0.86	<0.001/<0.001
Participant 3	12.1/9.1	−33.8/−26.8	−0.88/−0.81	<0.001/<0.001
Participant 4	13.2/9.8	−37.0/−27.8	−0.96/−0.96	<0.001/<0.001
Participant 5	11.3/8.2	−22.6/−14.5	−0.87/−0.89	<0.001/<0.001
Participant 6	–	–	–	–
Participant 7	12.5/8.9	−20.2/−16.8	−0.85/−0.97	<0.001/<0.001

Data are from gray/white matter.

Glx indicates glutamate + glutamine.