Table 4. Comparison of the radiographic values between automatic measurement and manual measurement in the asymptomatic group.
| Parameters | TK | LL | PI | PT | SVA | TPA |
|---|---|---|---|---|---|---|
| Mean difference | 3.8 | –5.1 | 3.6 | –0.1 | –2.2 | –1.1 |
| Mean absolute error | 5.4 | 6.8 | 5.1 | 1.6 | 4.6 | 2.1 |
| SD absolute error | 3.7 | 5.2 | 4.3 | 2.1 | 6.5 | 2.5 |
| Coefficient of variation | 18.8 | 15.2 | 11.1 | 13.2 | 25.4 | 21.0 |
| Max absolute error | 22.5 | 34.1 | 33.3 | 14.8 | 54.0 | 15.9 |
TK, thoracic kyphosis; LL, lumbar lordosis; SS, sacral slope; PT, pelvic tilt; PI, pelvic incidence; SVA, sagittal vertical axis; TPA, T1 pelvic angle.