Measurement of PI and PT with LSTV as LLV or S1.
| Optimum Vertebral Level of LSTV | LLV_PI | LLV_PT | S_PI | S_PT |
| LSTV = LLV (n = 14) | 50.5 (5.6) | 18.3 (5.5) | 31.5 (5.2) | 8.9 (7.5) |
| LSTV = S1 (n = 29) | 68.1 (7.8) | 35.4 (4.7) | 48.3 (7.4) | 17.7 (5.3) |
| LSTV = intermediate (n = 13) | 61.4 (3.4) | 24.7 (2.9) | 42.2 (3.9) | 11.5 (3.5) |
Abbreviations: LLV, lowest lumbar vertebra; LSTV, lumbosacral transitional vertebra; PI, pelvic incidence; PT, pelvic tilt.