Table 2.
Coefficient of Variance for Anatomic and Diffusion MRI Measurements in Patients with No Change in mJOA (N = 37).
| Canal Diameter | Torg Ratio | FA at C1–2 | MD at C1–2 | FA at Site of Compression | MD at Site of Compression | |
|---|---|---|---|---|---|---|
| Minimum | 0.1 | 2.6 | 1.1 | 1.1 | 0.8 | 0.2 |
| 25% Percentile | 3.4 | 6.1 | 4.1 | 4.7 | 6.2 | 4.2 |
| Median | 7.4 | 9.3 | 8.7 | 6.5 | 12.0 | 9.3 |
| 75% Percentile | 12.0 | 12.6 | 17.1 | 8.8 | 22.3 | 15.4 |
| Maximum | 44.0 | 78.4 | 27.7 | 27.8 | 34.1 | 57.1 |
| Mean | 9.0 | 12.2 | 11.2 | 7.4 | 14.2 | 11.4 |
| Std. Deviation | 8.1 | 13.3 | 8.2 | 4.9 | 10.2 | 10.6 |
| Std. Error of Mean | 1.3 | 2.2 | 1.4 | 0.8 | 1.7 | 1.7 |
| Lower 95% CI of mean | 6.3 | 7.8 | 8.4 | 5.8 | 10.8 | 7.9 |
| Upper 95% CI of mean | 11.7 | 16.7 | 13.9 | 9.0 | 17.6 | 15.0 |