Table 1.
Statistical values for comparisons of tissue volumes between the 0.3- and 3-T scanners
| Correlation analysis | Bland-Altman results | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| ICC | rp | %Bias | Ilr | dm | SE | CI | LOA | rBA | |
| GMV | 0.848* | 0.868* | 1.18 | 0.698 | 6.65 | 33.36 | -4.02 to 17.3 | -58.74 to 72.04 | -0.403* |
| WMV | 0.954* | 0.959* | 0.58 | 1.058 | -2.52 | 16.87 | -7.92 to 2.87 | -35.58 to 30.54 | 0.328 |
| CSFV | 0.901* | 0.902* | 5.37 | 0.87 | -22.21 | 34.13 | -33.12 to -11.29 | -89.11 to 44.69 | -0.081 |
| TBV | 0.974* | 0.975* | 0.41 | 0.924 | 4.13 | 24.78 | -3.80 to 12.05 | -44.45 to 52.70 | -0.239 |
| ICV | 0.984* | 0.984* | 1.28 | 0.955 | -18.08 | 25.97 | -26.39 to -9.78 | -68.99 to 32.82 | -0.167 |
CI, confidence interval at 95%; CSFV, cerebrospinal fluid volume; dm, mean difference; GMV, gray matter volume; ICC, interclass correlation coefficient; Ilr, inclination of the linear regression line; ICV, intracranial volume. P < .01 was defined as a significant correlation and was represented with an asterisk; LOA, limits of agreement at 95%; rBA, correlation coefficient of Bland-Altman; rp, Pearson’s correlation coefficient; SE, standard error of the mean difference; TBV: total brain volume; WMV, white matter volume.