Errors, bias, and variance of ReHo and FA measurements near CCMsa
| fMRI (ReHo) | ||
| Variable | Shell 1: 0–4 mm | Shell 2: 4–8 mm |
| Error, median APE (IQR) | 25.1% (13.5–43.6) | 15.0% (6.9–26.4) |
| Bias, mean PE (95% CI) | −27.2% (−33.8 to −19.8)b | −8.3% (−14.9 to −1.1)c |
| Variance, % deviation from mean | 28.3%−39.5% | 22.6%−29.2% |
| DTI (FA) | ||
| Variable | Shell 1: 0–4 mm | Shell 2: 4–8 mm |
| Error, median APE (IQR) | 9.2% (4.4–17.6) | 6.5% (2.1–11.7) |
| Bias, mean PE (95% CI) | −0.3% (−4.1–4.8)d | −0.1% (–3.1–2.9)e |
| Variance, % deviation from mean | 14.6%−17.1% | 10.4%−11.6% |
| ReHo vs FA: P value | ||
| Variable | Shell 1: 0– 4mm | Shell 2: 4–8 mm |
| Error | <.001 | <.001 |
| Bias | <.001 | .16 |
| Variance | <.001 | <.001 |