Table 2.
Radiographic Variables and Polyetheretherketone Cage-Related Variables.
| Subsidence Levels (N = 57) | Non-subsidence Levels (N = 80) | P Value | |
|---|---|---|---|
| Radiographic variables (mean) | |||
| ADH (mm) | |||
| Pre | 5.03 ± 3.65 | 4.85 ± 6.79 | .544 |
| Post | 6.24 ± 2.99 | 9.14 ± 5.72 | .035* |
| PDH (mm) | |||
| Pre | 4.58 ± 3.87 | 4.25 ± 5.43 | .314 |
| Post | 5.89 ± 5.43 | 8.54 ± 6.16 | .042* |
| SL (o) | |||
| Pre | 4.36 ± 2.31 | 5.12 ± 6.83 | .131 |
| Post | 6.44 ± 4.65 | 7.44 ± 4.65 | .901 |
| PI (o) | |||
| Pre | 54.21 ± 13.29 | 51.88 ± 22.17 | .081 |
| Post | |||
| SS (o) | |||
| Pre | 25.67 ± 8.11 | 27.32 ± 6.89 | .094 |
| Post | 29.23 ± 9.91 | 32.23 ± 5.21 | .064 |
| PT (o) | |||
| Pre | 11.75 ± 6.42 | 12.85 ± 8.27 | .112 |
| Post | 15.24 ± 12.12 | 17.18 ± 10.26 | .087 |
| LL (o) | |||
| Pre | 26.67 ± 12.77 | 25.79 ± 13.02 | .226 |
| Post | 32.21 ± 10.35 | 36.21 ± 19.56 | .019* |
| SVA (mm) | |||
| Pre | 48.22 ± 21.53 | 47.22 ± 18.33 | .199 |
| Post | 40.91 ± 18.24 | 38.13 ± 15.61 | .077 |
| Operated levels | |||
| L2/3 | 11 | 15 | .322 |
| L3/4 | 18 | 25 | .096 |
| L4/5 | 28 | 40 | .061 |
| PEEK height | |||
| 8 mm | 10 | 20 | .078 |
| 10 mm | 20 | 37 | .015* |
| 12 mm | 27 | 16 | .042* |
| PEEK length | |||
| 40 mm | 8 | 9 | .893 |
| 45 mm | 39 | 58 | .058 |
| 50 mm | 10 | 13 | .112 |
Values indicate mean and absolute numbers.
PDH, posterior disc height; SL, segmental lordosis; PI, pelvic incidence; SS, sacral slope; PT, pelvic tilt; LL, lumbar lordosis; SVA, sagittal vertical axis; Pre, preoperative; Post, postoperative (at 1 year); PEEK, polyetheretherketone; ADH, anterior disc height.
*Statistically significant difference (P < .05).