Table 1.

Age and gender of the cohort and the various volumetric, “V”, “v” (global and VOI) and quantitative “Q” and “q” NAA metrics. The average global NAA concentration in the GM (C_GM) and WM (C_GM) compartments of each individual are estimated from Eq. [5] in the two rightmost columns (bold). Note that the average global C_GM is significantly higher than C_WM (p<0.001).

Subject	aAge/sex	bVB	bVWM	bVGM	bvVOI	bvWM	bvGM	cQNAA	cqNAA	dCWM	dCGM
1	22/M	1466	557	906	457	319	124	17.8	4.8	8.9	14.1
2	22/F	1238	461	770	451	310	141	15.00	4.8	9.0	14.0
3	24/F	1098	650	410	458	309	149	13.08	4.9	9.6	13.3
4	26/M	1289	434	848	453	322	130	16.2	4.7	8.6	14.6
5	27/M	1233	521	712	447	295	146	13.5	5.0	9.8	13.7
6	27/M	1439	650	789	452	340	128	16.8	4.7	9.4	13.8
7	28/F	1331	596	735	447	319	126	15.2	5.3	11.2	13.4
8	32/F	1212	487	725	440	322	118	15.3	5.1	10.8	13.5
9	36/M	1492	532	955	453	336	116	19.6	4.6	8.2	15.9
10	38/F	1198	473	725	452	315	141	16.5	5.3	9.8	16.4
Avg±SD	28.2±5.5	1300±130	536±76	758±148	451±5	319±13	132±12	15.9±2.0	4.9±0.2	9.5±1.0	14.3±1.1

^aUnits: years

^bUnits: cm³

^cUnits: millimoles

^dUnits: millimolar (mM).