Table II.

Reproducibility measures within the frontal white matter; voxel‐based

DTI index	Gradient scheme	Averaged mediana		RCa		ICC
		No co‐reg.	With co‐reg.	No co‐reg.	With co‐reg.	No co‐reg.	With co‐reg.
MD	Low	784	784	43 (22; 91)	35 (18; 64)	0.72 (0.05; 0.95)	0.79 (0.33; 0.97)
	Low+	795	796	50 (18; 122)	44 (17; 93)	0.71 (0.17; 0.96)	0.75 (0.32; 0.96)
	Med	786	787	36 (14; 77)	29 (12; 50)	0.80 (0.37; 0.97)	0.87 (0.63; 0.98)
	Med+	793	794	42 (19; 78)	35 (16; 58)	0.75 (0.22; 0.95)	0.82 (0.35; 0.96)
	High	784	785	34 (13; 71)	27 (11; 50)	0.80 (0.25; 0.98)	0.85 (0.52; 0.99)
	High+	794	795	37 (16; 64)	34 (14; 63)	0.77 (0.30; 0.97)	0.77 (0.29; 0.97)
FA	Low	0.43	0.42	0.04 (0.02; 0.08)	0.03 (0.01; 0.06)	0.77 (0.20; 0.97)	0.86 (0.48; 0.98)
	Low+	0.43	0.42	0.05 (0.02; 0.10)	0.04 (0.02; 0.08)	0.77 (0.15; 0.98)	0.83 (0.32; 0.98)
	Med	0.41	0.41	0.03 (0.01; 0.05)	0.02 (0.01; 0.04)	0.90 (0.58; 0.99)	0.92 (0.68; 0.99)
	Med+	0.41	0.41	0.03 (0.01; 0.07)	0.03 (0.01; 0.05)	0.84 (0.38; 0.98)	0.88 (0.50; 0.99)
	High	0.41	0.41	0.03 (0.01; 0.05)	0.02 (0.01; 0.04)	0.89 (0.56; 0.99)	0.92 (0.67; 0.99)
	High+	0.41	0.41	0.03 (0.01; 0.05)	0.03 (0.01; 0.05)	0.88 (0.52; 0.99)	0.89 (0.56; 0.99)

The values between brackets correspond to the 2.5 and 97.5% quantile differences.

RC, repeatability coefficient; ICC, intraclass correlation coefficient; MD, mean diffusivity (μm²/s); FA, fractional anisotropy.

^aUnits of the MR quantity.