Table 3.
Correlation analysis on relationship between variables affecting JOA recovery rate
| Variable | Value | Recovery rate | Age | Sx duration | Preop JOA | Postop JOA | ROI | Ref. ROI | SIR | Signal change |
|---|---|---|---|---|---|---|---|---|---|---|
| Recovery rate | Coefficient | 1 | ||||||||
| p-value | ||||||||||
| Age | Coefficient | -0.112 | 1 | |||||||
| p-value | 0.602 | |||||||||
| Sx duration | Coefficient | -0.021 | 0.094 | 1 | ||||||
| p-value | 0.923 | 0.664 | ||||||||
| Preop JOA | Coefficient | 0.498 | -0.362 | 0.126 | 1 | |||||
| p-value | 0.013* | 0.082 | 0.559 | |||||||
| Postop JOA | Coefficient | 0.849 | -0.339 | 0.035 | 0.863 | 1 | ||||
| p-value | 0.000* | 0.105 | 0.870 | 0.000* | ||||||
| ROI | Coefficient | -0.019 | -0.128 | 0.256 | 0.117 | 0.005 | 1 | |||
| p-value | 0.929 | 0.550 | 0.228 | 0.585 | 0.982 | |||||
| Ref. ROI | Coefficient | 0.264 | -0.117 | 0.237 | 0.171 | 0.239 | 0.682 | 1 | ||
| p-value | 0.212 | 0.586 | 0.265 | 0.425 | 0.261 | 0.000* | ||||
| SIR | Coefficient | -0.598 | 0.071 | -0.547 | -0.314 | -0.547 | 0.437 | -0.160 | 1 | |
| p-value | 0.002* | 0.742 | 0.006* | 0.135 | 0.006* | 0.033* | 0.456 | |||
| Signal change | Coefficient | 0.028 | 0.328 | -0.543 | -0.168 | -0.056 | -0.228 | -0.118 | -0.191 | 1 |
| p-value | 0.898 | 0.117 | 0.006* | 0.432 | 0.793 | 0.285 | 0.582 | 0.371 |
Coefficient: Spearman correlation coefficient; Sx, symptom; preop, preoperative; postop, postoperative; JOA, Japanese Orthopaedics Association; OLF, ossification of ligamentum flavum; HSI, high signal intensity; ROI, regions of interest; Ref., reference; SIR, signal intensity ratio.
*
Statistical significance between variables by Spearman correlation analysis satisfied with p<0.05.