Background
Methods
Patients and methods
Evaluations
Statistical analysis
Results
Demographic data
Male + Female (n = 322) | Male (n = 242) | Female (n = 80) | P (M vs F) | |
---|---|---|---|---|
Age (years old) | 64.7 ± 11.2 | 64.7 ± 11.6 | 64.6 ± 10.0 | 0.90 |
Diabetes Mellitus (%) | 31.7% | 31.8% | 31.3% | 0.92 |
BMI | 25.7 ± 4.8 | 25.8 ± 4.8 | 25.5 ± 4.7 | 0.62 |
JOSL CT classification | ||||
Grade 1 (1 < cervical OP-index≤5) | 169 (52.5%) | 125 (51.7%) | 44 (55%) | – |
Grade 2 (6 < cervical OP-index ≤9) | 107 (33.2%) | 83 (34.3%) | 24 (30%) | – |
Grade 3 (10 < cervical OP-index) | 46 (14.3%) | 34 (14.0%) | 12 (15%) | – |
Cervical OP-index | 5.83 ± 2.9 | 5.86 ± 2.9 | 5.75 ± 3.0 | 0.78 |
OP-index | 9.21 ± 6.8 | 8.24 ± 5.5 | 12.1 ± 9.0 | < 0.01 |
No. of patients with OP-index of > = 20 (%) | 27 (8.3%) | 11 (4.5%) | 16 (20%) | < 0.01 |
Pattern of distribution of ossified lesions throughout the spine in patients with severe OPLL
Male | Female | |||
---|---|---|---|---|
Segment | Folds change | p | Folds change | p |
T1 | 4.9 | 0 | 2.7 | 0.0008 |
T1–2 | 6.0 | 0 | 2.3 | 0.0079 |
T2 | 6.9 | 0 | 2.9 | 0.0023 |
T2–3 | 7.6 | 0 | 2.7 | 0.0004 |
T3 | 12.0 | 0 | 2.9 | 0.0012 |
T3–4 | 6.6 | 0 | 2.4 | 0.0012 |
T4 | 11.0 | 0 | 3.0 | 0.0044 |
T4–5 | 5.5 | 0 | 3.1 | 0 |
T5 | – | 0.1224 | 2.9 | 0.0023 |
T5–6 | 3.9 | 0.005 | 2.8 | 0.0001 |
T6 | 8.8 | 0.0246 | 3.0 | 0.0044 |
T6–7 | – | 0.0505 | 3.0 | 0.0003 |
T7 | 7.3 | 0.0424 | 2.5 | 0.0469 |
T7–8 | 5.5 | 0.0001 | 2.5 | 0.0039 |
T8 | 8.8 | 0.0246 | – | 0.0794 |
T8–9 | 4.2 | 0.0127 | 2.8 | 0.0068 |
T9 | 11.0 | 0.0121 | 3.2 | 0.0141 |
T9–10 | 4.0 | 0.0161 | 3.0 | 0.0044 |
T10 | – | 0.628 | – | 0.2477 |
T10–11 | – | 0.3488 | 2.7 | 0.0327 |
T11 | 11.0 | 0.0121 | – | 0.455 |
T11–12 | 6.3 | 0 | – | 0.0871 |
T12 | 12.6 | 0 | 4.2 | 0.0219 |
T12-L1 | 3.8 | 0.0019 | 3.0 | 0.0001 |
L1 | 7.9 | 0 | 3.3 | 0.0237 |
L1–2 | 5.0 | 0 | 2.7 | 0.0186 |
L2 | 9.2 | 0 | 3.3 | 0.0237 |
L2–3 | 5.1 | 0.0001 | 2.5 | 0.0148 |
L3 | 11.0 | 0.0121 | – | 0.1003 |
L3–4 | 5.5 | 0.0159 | – | 0.3594 |
L4 | – | 0.1505 | – | 0.2534 |
L4–5 | – | 0.4713 | – | 0.1779 |
L5 | – | 0.2926 | – | 0.4113 |
L5-S1 | 4.2 | 0 | 3.1 | 0.0081 |
S1 | – | 0.1505 | – | – |
Prevalence of OPLL at each level according to cervical OP index grade
JOSL-CT grading system for prediction of prevalence of OPLL at each thoracolumbar spinal level
Grade 1+ | Male | Female | ||
---|---|---|---|---|
Segment | Odds ratio | p | Odds ratio | p |
T1 | 5.0 | 0 | 4.5 | 0 |
T1–2 | 3.2 | 0 | 3.5 | 0.001 |
T2 | 4.3 | 0 | 3.1 | 0.003 |
T2–3 | 2.5 | 0.001 | 3.1 | 0.002 |
T3 | 3.3 | 0.005 | 3.7 | 0.001 |
T3–4 | 2.1 | 0.004 | 2.6 | 0.006 |
T4 | – | 0.07 | 2.3 | 0.027 |
T4–5 | – | 0.133 | 4.3 | 0 |
T5 | – | 0.12 | – | 0.111 |
T5–6 | – | 0.24 | 2.4 | 0.01 |
T6 | 6.5 | 0.013 | 2.3 | 0.034 |
T6–7 | – | 0.084 | 2.0 | 0.045 |
T7 | – | 0.077 | – | 0.169 |
T7–8 | – | 0.089 | – | 0.075 |
T8 | – | 0.09 | – | 0.123 |
T8–9 | – | 0.078 | 3.1 | 0.003 |
T9 | – | 0.104 | – | 0.312 |
T9–10 | – | 0.359 | 2.3 | 0.027 |
T10 | – | 0.25 | – | 0.234 |
T10–11 | – | 0.628 | 2.2 | 0.043 |
T11 | 5.0 | 0.036 | – | 0.153 |
T11–12 | 2.7 | 0.001 | 3.1 | 0.003 |
T12 | 3.3 | 0.023 | 3.7 | 0.024 |
T12-L1 | 2.0 | 0.007 | 3.4 | 0.001 |
L1 | 2.3 | 0.021 | – | 0.101 |
L1–2 | 2.3 | 0.006 | – | 0.08 |
L2 | – | 0.07 | – | 0.465 |
L2–3 | 2.7 | 0 | 2.1 | 0.041 |
L3 | 5.0 | 0.036 | – | 0.189 |
L3–4 | – | 0.07 | – | 0.763 |
L4 | – | 0.993 | – | 0.46 |
L4–5 | – | 0.449 | – | 0.381 |
L5 | – | 0.47 | – | 0.118 |
L5-S1 | – | 0.24 | – | 0.312 |
S1 | 5.0 | 0.993 | – | – |