Fig 1.
Flow chart showing search strategy.
Table 1.
Characteristics of all included studies.
Table 2.
Risk of bias assessment of all included studies.
Fig 2.
Forest plot for overall success and NDI success.
Fig 3.
Forest plot for neurological success and implant/surgery-related serious adverse events.
Fig 4.
Forest plot for secondary procedure.
Fig 5.
Forest plot for functional outcomes.
Fig 6.
Forest plot for patient satisfaction and recommendation.
Fig 7.
Forest plot for radiological adjacent segment degeneration.
Fig 8.
Forest plot for follow-up rate.
Table 3.
Subgroup analysis of patients with 1-level cervical disc disease.