Postoperative recovery course, but not preoperative factors and operative kyphosis correction can predict final neurological outcome of posterior decompression with instrumented surgery for ossification of the posterior longitudinal ligament of the thorac

- There is currently no preoperative factor for prediction of neurological outcome.
- Postoperative change of kyphosis had no significant impact on the neurological outcome.
- Recovery of JOA score during the first 3 months can predict the final neurological outcome.