Table 2. Repeatability indexes used to assess the repeatability of metrics in different sub-regions of the WM.
| ROI | Mean ± SDsubjects | CId | ICC |
MDC [% of SDsubjects] |
|
|---|---|---|---|---|---|
| T1 (ms) | WM | 1011.2 ± 60.8 | -29.4 to 19.3 | 0.74 | ± 89.3 [146.8] |
| DC | 1068.3 ± 63.7 | -69.0 to 5.4 | 0.41 | ± 146.8 [230.5] | |
| LF | 971.6 ± 64.5 | -22.9 to 39.6 | 0.52 | ± 115.6 [179.2] | |
| VF | 1006.8 ± 168.0 | -60.0 to 71.5 | 0.68 | ± 240.8 [143.4] | |
| MTR (%) | WM | 45.82 ± 1.3 | -0.99 to 0.37 | 0.28 | ± 2.55 [196.2] |
| DC | 46.08 ± 0.87 | -1.02 to 0.07 | 0.29 | ± 2.15 [247.3] | |
| LF | 46.09 ± 1.54 | -0.94 to 0.53 | 0.38 | ± 2.73 [178.1] | |
| VF | 44.64 ± 2.48 | -1.65 to 0.93 | 0.35 | ± 4.8 [193.1] | |
| MTsat (%) | WM | 3.517 ± 0.177 | -0.022 to 0.152 | 0.6 | ± 0.34 [192.4] |
| DC | 3.452 ± 0.181 | -0.029 to 0.25 | 0.1 | ± 0.543 [299.5] | |
| LF | 3.59 ± 0.202 | -0.009 to 0.118 | 0.82 | ± 0.252 [124.9] | |
| VF | 3.438 ± 0.283 | -0.124 to 0.172 | 0.54 | ± 0.546 [192.6] | |
| MTV (%) | WM | 36.79 ± 2.3 | -0.96 to 1.13 | 0.6 | ± 3.83 [166.4] |
| DC | 36.46 ± 2.24 | -0.65 to 1.34 | 0.6 | ± 3.7 [164.7] | |
| LF | 36.88 ± 2.41 | -1.21 to 0.89 | 0.65 | ± 3.87 [160.6] | |
| VF | 37.17 ± 2.95 | -1.2 to 1.81 | 0.42 | ± 5.58 [189.1] |
From left to right, the columns correspond to the mean ± SD across subjects (n = 16) based on values from the first scan session only, the 95% confidence interval of the true test-retest difference, the ICC coefficient, the MDC. All numbers are in the metric unit except those in square brackets, which are expressed as a percentage of the SD across subjects to quantify the repeatability with respect to the inter-subject difference, i.e. the reliability. Fig 3 is a subset of this table.