Table 3 Radiographic outcomes between small-ROM and large-ROM groups
From: Effect of preoperative segmental range of motion on patient outcomes in cervical disc arthroplasty
Small-ROM | Large-ROM | P | |
|---|---|---|---|
Cervical lordosis (°) a | |||
Pre-op | 6.25 ± 11.24 | 12.01 ± 12.62 | 0.008 |
Post-op | 10.45 ± 7.90 | 12.06 ± 9.08 | 0.288 |
C2-C7 ROM (°) a | |||
Pre-op | 37.85 ± 13.51 | 59.79 ± 11.79 | < 0.001 |
Post-op | 45.38 ± 12.14 | 53.24° ± 12.56° | < 0.001 |
△ROM | 7.53 ± 15.92° | −6.55° ± 13.48° | < 0.001 |
Disc angle (°) a | |||
Pre-op | 1.19 ± 2.88 | 4.09 ± 4.09 | < 0.001 |
Post-op | 1.13 ± 3.80 | 2.13 ± 3.75 | 0.125 |
Segmental ROM (°) a | |||
Pre-op | 4.05 ± 1.04 | 14.80 ± 1.82 | < 0.001 |
Post-op | 7.11 ± 3.43 | 10.02 ± 4.07 | < 0.001 |
△ROM | 3.05 ± 3.69 | −4.77 ± 4.22 | < 0.001 |
Disc height (mm) a | |||
Pre-op | 5.22 ± 0.81 | 5.59 ± 0.85 | 0.012 |
Post-op (immediately) | 6.40 ± 0.70 | 6.60 ± 0.77 | 0.368 |
△DH | 1.18 ± 0.73 | 0.93 ± 0.60 | 0.034 |
ASD (%)b | 12 (18.8%) | 10 (16.1%) | 0.698 |
HO formation (%) b | 40 (60.6%) | 28 (42.4%) | 0.037 |
HO classification (%)b | 0.131 | ||
Low-grade | 49 (74.2%) | 56 (84.8%) | |
High-grade | 17 (25.8%) | 10 (15.2%) | |
Subsidence (%)c | 2 | 3 | 1.000 |