Summary of r and P values from Pearson correlation analysis including postoperative L5 to S1 SL vs cage angle and preoperative radiographic variables.
| Preoperative Variable | Postoperative L5–S1 SL | |
| P | r | |
| Cage anglea | 0.009 | 0.40 |
| Pelvic tilt | 0.43 | 0.12 |
| Sacral slopea | 0.02 | −0.36 |
| Lumbar lordosis | 0.01 | 0.38 |
| PI – LL | 0.16 | 0.23 |
| Sagittal vertical axis | 0.86 | 0.03 |
| L1–L2 SL | 0.48 | 0.12 |
| L2–L3 SL | 0.13 | 0.24 |
| L3–L4 SL | 0.74 | 0.06 |
| L4–L5 SL | 0.007 | 0.42 |
| L5–S1 SLa | <0.001 | 0.54 |
| T2–T5 thoracic kyphosis | 0.87 | 0.02 |
| T5–T12 thoracic kyphosis | 0.60 | −0.07 |
| T1 pelvic angle | 0.80 | 0.04 |
| Global tilt | 0.80 | 0.04 |
| Anterior disc height | 0.79 | −0.04 |
| Posterior disc height | 0.87 | −0.02 |
| Neuroforaminal height | 0.46 | 0.117 |
| Cage height | 0.36 | −0.15 |
| Cage width | 0.61 | −0.83 |
| Cage depth | 0.81 | −0.04 |
Abbreviations: PI – LL, difference between pelvic incidence and lumbar lordosis; SL, segmental lordosis.
Note: Boldface indicates statistical significance at P < 0.05.
↵a Power > 0.8.