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Table 3 Hazard ratio of the incidence of ossified lesion at each level in patients with OP-index 20 compared to total patients

From: Distribution of ossified spinal lesions in patients with severe ossification of the posterior longitudinal ligament and prediction of ossification at each segment based on the cervical OP index classification: a multicenter study (JOSL CT study)

  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
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