Interobserver and intraobserver agreement for the spine specialists and pooled surgical specialist samples.
| Specialty | Kendall’s W | Agreement Status |
| Interobserver agreement | ||
| Orthopedic | 0.79 | Acceptable |
| Neurological | 0.88 | Appreciable |
| Combined spine | 0.80 | Appreciable |
| Combined all | 0.88 | Appreciable |
| Intraobserver agreement | ||
| Orthopedic | 0.91 | Excellent |
| Neurological | 0.95 | Excellent |
| Combined spine | 0.92 | Excellent |
| Combined all | 0.96 | Excellent |