Calculated lumbar parameters.
| Parameter | Combined (N = 111) | Normal (LDI 50%–80%) (n = 81) | Hypolordotic (LDI <50%) (n = 14) | Hyperlordotic (LDI >80%) (n = 16) |
| PI−LL (°) | ||||
| Preoperative | 5.98 (11.13) | 3.58 (10.35) | 13.04 (11.99) | 12.21 (9.89) |
| Postoperative | 3.73 (10.92) | 2.06 (9.71) | 6.16 (13.12) | 10.01 (12.64) |
| Change | −2.33 | −1.49 | −7.64 | −2.20 |
| P | 0.003 | 0.071 | 0.031 | 0.241 |
| LDI (%) | ||||
| Preoperative | 64.37 (16.10) | 63.72 (8.17) | 37.77 (9.07) | 90.91 (7.77) |
| Postoperative | 67.11 (16.29) | 67.53 (13.34) | 46.18 (10.43) | 83.33 (14.62) |
| Change | 2.75 | 3.81 | 8.41 | −7.58 |
| P | 0.045 | 0.010 | 0.030 | 0.092 |
Abbreviations: LDI, lordosis distribution index; PI−LL, difference between pelvic incidence and lumbar lordosis.
Note: Pre- and postoperative values are presented as mean (SD). Significant P values (<0.05) are shown in bold.