Table 2.
Intra- and inter-rater reliability test for all radiographic parameters
| Parameter | Intra-rater coefficient | Inter-rater coefficient |
|---|---|---|
| SVA | 0.97 | 0.95 |
| TK | 0.97 | 0.94 |
| TLK | 0.93 | 0.93 |
| LL | 0.96 | 0.96 |
| SSA | 0.94 | 0.93 |
| SS | 0.95 | 0.91 |
| T1SPI | 0.92 | 0.91 |
| T9SPI | 0.94 | 0.91 |
| PI | 0.92 | 0.91 |
| PT | 0.93 | 0.91 |
| CVA | 0.97 | 0.94 |
| CPT | 0.89 | 0.89 |
| HKAA (Left) | 0.95 | 0.93 |
| HKAA (Right) | 0.95 | 0.94 |
| MPFA (Left) | 0.90 | 0.93 |
| MPFA (Right) | 0.93 | 0.92 |
| mLDFA (Left) | 0.88 | 0.88 |
| mLDFA (Right) | 0.83 | 0.83 |
| MPTA (Left) | 0.92 | 0.86 |
| MPTA (Right) | 0.92 | 0.86 |
| LDTA (Left) | 0.84 | 0.87 |
| LDTA (Right) | 0.84 | 0.83 |
| Total length (Left) | 0.95 | 0.81 |
| Total length (Right) | 0.96 | 0.94 |
| Femoral length (Left) | 0.92 | 0.91 |
| Femoral length (Right) | 0.94 | 0.94 |
| Tibal length (Left) | 0.96 | 0.92 |
| Tibal length (Right) | 0.95 | 0.91 |
| KL Classification (Left) | 0.88 | 0.82 |
| KL Classification (Right) | 0.80 | 0.82 |
| Takakura Classification (Left) | 0.80 | 0.80 |
| Takakura Classification (Right) | 0.81 | 0.87 |
SVA: sagittal vertical axis; TK: thoracic kyphosis angle; TLK: thoracolumbar kyphosis angle; LL: lumbar lordosis angle; SSA: spino-sacral angle; SS: sacral slope angle; T1SPI: T1 spinopelvic inclination angle; T9SPI: T9 spinopelvic inclination angle; PI: pelvic incidence angle; PT: pelvic tilt angle; CVA: coronal vertical axis; CPT: coronal pelvic tilt angle; HKAA: hip-knee-ankle angle; MPFA: medial proximal femoral angle; mLDFA: mechanical lateral distal femoral angle; MPTA: medial proximal tibial angle; LDTA: lateral distal tibial angle.