Table 3. Preference choice of the 2 surgical approaches for OPLL.

	Anterior	Posterior
occupying ratio ≥ 60%	√	–
Functional recovery rate	√	–
Preoperative JOA scores	√	–
Postoperative JOA scores	√	–
Preoperative cervical lordosis	○	○
Postoperative cervical lordosis	○	○
Excellent and good outcomes	√	–
Complications	–	√
Reoperation	–	√

√: favor; –: Not favor; ○: Not estimate.