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| Variables | OPLL | p-value | |
|---|---|---|---|
| Progression | Non-progression | ||
| Pre-op neck VAS | 4.5±0.8 | 4.6±0.8 | 0.83 |
| Pre-op arm VAS | 5.8±0.4 | 5.7±0.7 | 0.81 |
| Post-op neck VAS | 1.1±0.9 | 0.6±0.7 | 0.14 |
| Post-op arm VAS | 1.9±0.7 | 1.7±0.8 | 0.46 |
VAS: visual analogue scale, OPLL: ossification of the posterior longitudinal ligament, Pre-op: immediately preoperative, Post-op: 24 months after surgery.
