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.