TABLE 2:

Test-Retest and Interrater Reliability Versus Other Linear Measures of MTL Atrophy in 20 Patients with AD and 20 Control Subjects in the CT Group

				Mean Difference Between Measurements				Intraclass Correlation
	Crude Values (mm) Test			Crude (mm)		Standardized (z)		Coefficient
	1st Rater, Test	1st Rater, Retest	2nd Rater	Within Rater	Between Raters	Within Rater	Between Raters	Within Rater	Between Raters
Mean radial width of the temporal horn ± SD
Right	4.6 ± 3.0	4.4 ± 2.9	4.5 ± 2.7	0.21 ± .67	−0.20 ± 0.77	0.07 ± 0.22	−0.09 ± 0.25	0.97	0.96
Left	4.0 ± 2.8	3.9 ± 2.7	4.1 ± 2.7	0.11 ± .48	−0.19 ± 0.65	0.04 ± 0.17	−0.05 ± 0.23	0.98	0.95
Largest	5.1 ± 3.0	4.9 ± 2.8	5.2 ± 3.0	0.25 ± .56	−0.29 ± 0.81	0.09 ± 0.19	−0.12 ± 0.26	0.98	0.94
Mean transverse widthof the temporal horn ± SD
Right	3.6 ± 1.5	3.7 ± 1.6	3.7 ± 1.5	−0.09 ± .34	−0.05 ± 0.59	−0.06 ± 0.23	−0.03 ± 0.41	0.97	0.93
Left	4.7 ± 2.5	4.8 ± 2.5	4.8 ± 2.3	−0.14 ± .46	−0.16 ± 0.58	−0.05 ± 0.18	−0.06 ± 0.23	0.98	0.97
Largest	5.1 ± 2.4	5.2 ± 2.2	5.3 ± 2.3	−0.09 ± .42	−0.18 ± 0.64	−0.04 ± 0.18	−0.08 ± 0.27	0.98	0.96
Mean minimum thickness of the MLT ± SD
Right	13.5 ± 3.3	14.2 ± 3.0	14.0 ± 4.1	−0.71 ± 2.36	−0.51 ± 2.47	−0.22 ± 0.72	−0.16 ± 0.76	0.71	0.73
Left	14.1 ± 3.4	14.3 ± 2.7	14.4 ± 3.9	−0.20 ± 2.43	−0.36 ± 2.68	−0.06 ± 0.71	−0.10 ± 0.78	0.69	0.66
Smallest	12.9 ± 3.3	13.4 ± 2.7	13.3 ± 4.1	−0.43 ± 2.20	−0.39 ± 2.42	−0.13 ± 0.67	−0.12 ± 0.73	0.74	0.78

Note.—Standardized (z) differences are computed by considering control subjects as the reference group.