Table 2.

Mean (±SD) values for BDD and healthy control groups for white matter diffusion measures in the ILF, IFOF, and the FM^a

		ILF	IFOF	FM	df	error	F	P
FA
	BDD	0.40±(0.062)	0.44±(0.079)	0.54±(0.075)
	Healthy controls	0.41±(0.058)	0.45±(0.051)	0.52±(0.046)
group					1	28	0.029	0.87
group-by-tract					2	56	1.81	0.17
MD^b
	BDD	0.00081±(0.00003)	0.00081±(0.00004)	0.00082±(0.00014)
	Healthy controls	0.00082±(0.00007)	0.00081±(0.00005)	0.00078±(0.00004)
group					1	28	0.178	0.68
group-by-tract					1.7	49	1.44	0.246
*c_l*
	BDD	0.36±(0.058)	0.42±(0.079)	0.51±(0.072)
	Healthy controls	0.37±(0.052)	0.43±(0.056)	0.48±(0.048)
group					1	28	0.000	0.98
group-by-tract					1.9	53	2.47	0.097
*c_p*
	BDD	0.18±(0.018)	0.16±(0.013)	0.15±(0.020)
	Healthy controls	0.19±(0.015)	0.16±(0.017)	0.16±(0.021)
group					1	28	2.12	0.156
group-by-tract					2	56	1.65	0.20

Results presented for repeated measures ANOVA with group (BDD or healthy control) as one factor and tract (ILF, IFOF, and FM) as the other

In units of mm²/s factor. Huynh-Feldt adjustments for sphericity were used.

BDD = body dysmorphic disorder; ILF = inferior longitudinal fasciculus; IFOF = inferior longitudinal fasciculus; FM = forceps major; FA = fractional anisotropy; MD = mean diffusivity; c_l = linear anisotropy; c_p = planar anisotropy