TABLE 1

Descriptive Statistics for All Outcome Measures

Measure	cLBP	Control (cLBP)	ALS	Control (ALS)
SUV
Target	0.698 ± 0.25 (35.8%)	0.525 ± 0.15 (28.6%)	0.495 ± 0.11 (22.2%)	0.488 ± 0.12 (24.6%)
WB	0.470 ± 0.16 (34.0%)	0.412 ± 0.09 (21.8%)	0.416 ± 0.10 (24.0%)	0.441 ± 0.10 (22.7%)
Occipital cortex	0.542 ± 0.21 (38.7%)	0.482 ± 0.11 (22.8%)	0.432 ± 0.13 (30.1%)	0.470 ± 0.11 (23.4%)
Cerebellum	0.556 ± 0.24 (43.2%)	0.497 ± 0.10 (20.1%)	0.460 ± 0.12 (26.1%)	0.480 ± 0.10 (20.8%)
V_T
Target	2.81 ± 0.84 (29.9%)	1.95 ± 0.71 (36.4%)	2.53 ± 0.75 (29.6%)	1.72 ± 0.60 (34.9%)
WB	2.17 ± 0.59 (27.2%)	1.64 ± 0.58 (35.4%)	2.24 ± 0.73 (32.6%)	1.65 ± 0.59 (35.8%)
Occipital cortex	2.27 ± 0.74 (32.6%)	1.82 ± 0.69 (37.9%)	2.33 ± 0.80 (34.3%)	1.82 ± 0.68 (37.4%)
Cerebellum	2.49 ± 0.85 (34.1%)	1.84 ± 0.71 (38.6%)	2.32 ± 0.91 (39.2%)	1.84 ± 0.71 (38.6%)
SUVR
SUVR_WB	1.27 ± 0.06 (4.72%)	1.12 ± 0.11 (9.82%)	1.14 ± 0.08 (7.02%)	1.06 ± 0.07 (6.60%)
SUVR_occip	1.23 ± 0.07 (5.69%)	1.03 ± 0.10 (9.71%)	1.12 ± 0.13 (11.6%)	1.00 ± 0.09 (9.00%)
SUVR_cereb	1.22 ± 0.20 (16.4%)	1.00 ± 0.14 (14.0%)	1.04 ± 0.13 (12.5%)	0.984 ± 0.17 (17.3%)
refDVR_occip	1.16 ± 0.08 (6.70%)	1.03 ± 0.16 (15.5%)	1.11 ± 0.12 (10.8%)	0.980 ± 0.08 (8.16%)
blDVR_occip	1.25 ± 0.11 (8.80%)	1.08 ± 0.10 (9.26%)	1.11 ± 0.13 (11.7%)	0.951 ± 0.07 (7.36%)

Values are mean ± SD, with percentage coefficient of variation shown in parentheses. Target refers to regions showing largest group differences in original studies: bilateral thalamus (cLBP) and bilateral precentral gyrus (ALS). Values for blood-based measures (V_T and blDVR) exclude plasma outlier subjects.