Table 1.

Slope, β, and significance, p, of the regression terms incorporated in the multiple linear regression given by: MWF ~ β₀ + β_BMI × BMI + β_age × age + β_age² ×age² + β_sex × sex + β_ethnicity × ethnicity. Sex and ethnicity results are not shown as they exhibited non-significant associations with MWF in all ROIs. All p-values presented are obtained after FDR correction.

MWF
	BMI		Age		Age2
	βBMI (× 103)	pBMI	βage (× 104)	page	βage2 (× 105)	page2
WB	−1.46	0.053	−7.19	0.000	−2.06	0.012
FL	−1.68	0.049	−8.56	0.000	−2.29	0.012
OL	−1.37	0.099	−5.73	0.000	−2.29	0.019
PL	−1.45	0.036	−6.34	0.000	−2.08	0.013
TL	−1.75	0.029	−8.68	0.000	−2.16	0.012
CRB	−1.06	0.108	−4.52	0.000	−1.11	0.104
BCC	−1.36	0.100	−7.53	0.000	−1.79	0.038
GCC	−1.90	0.019	−9.51	0.000	−1.55	0.034
SCC	−1.58	0.036	−6.92	0.000	−2.51	0.012
IC	−1.53	0.053	−7.17	0.000	−1.74	0.026
CP	−0.93	0.137	−3.15	0.000	−0.91	0.156
ACR	−2.38	0.017	−10.30	0.000	−1.93	0.030
PCR	−3.09	0.005	−11.15	0.000	−2.59	0.012
ATR	−2.18	0.017	−8.82	0.000	−1.49	0.056
PTR	−1.76	0.050	−9.60	0.000	−2.10	0.021
SFOF	−1.90	0.036	−10.42	0.000	−2.30	0.012
IFOF	−1.76	0.053	−9.10	0.000	−2.10	0.024
SLF	−2.54	0.005	−8.55	0.000	−2.11	0.012
ILF	−1.68	0.005	−7.57	0.000	−2.17	0.023
Fm	−1.70	0.055	−7.25	0.000	−2.39	0.012
FM	−0.50	0.508	−3.81	0.001	−1.65	0.044

MWF: myelin water fraction, BMI: body mass index, WB: whole brain, FL: frontal lobes, PL: parietal lobes, TL: temporal lobes, OL: occipital lobes, CRB: cerebellum, BCC: body of corpus callosum, GCC: genu of corpus callosum, SCC: splenium of corpus callosum, IC: internal capsules, CP: cerebral peduncle, ACR: anterior corona radiata, PCR: posterior corona radiata, ATR: anterior thalamic radiation, PTR: posterior thalamic radiation, IFOF: inferior fronto-occipital fasciculus, SFOF: superior fronto-occipital fasciculus, ILF: inferior longitudinal fasciculus, SLF: superior longitudinal fasciculus, Fm: forceps minor, FM: forceps major.