Table 3.
Cohen’s kappa (%) for the categorical scoring between synthetic CT (sCT) and CT
| Measurement | Kappa (%) | ||
|---|---|---|---|
| Right side | Left side | ||
| Lumbosacral transitional anomaly: | 100 | ||
| Fusion of the growth plates of the sacrum S1/S2: | 83.9 | ||
| Fusion of the growth plates of the sacrum S2/S3: | 84.8 | ||
| Cortical delineation of the joint space of the iliac side: | 100a | 100a | |
| Cortical delineation of the joint space of the sacral side: | 100a | 100a | |
| Joint facet defect (≥ 3 mm) on the iliac side: | 100a | 61.5 | |
| Joint facet defect (≥ 3 mm) on the sacral: | 100a | 100a | |
| Presence of ossified nuclei of the SI joint: | 67.2 | 67.2 | |
| Bony bridges of the SI joint: | 100a | 0 | |
Abbreviations: sCT synthetic CT, S sacral; SI joint sacroiliac joint
a100% perfect agreement between sCT and CT, kappa could not be calculated because of lack of variability