Fig. 4From: Cervical disc arthroplasty (CDA) versus anterior cervical discectomy and fusion (ACDF) in symptomatic cervical degenerative disc diseases (CDDDs): an updated meta-analysis of prospective randomized controlled trials (RCTs)Forest plot for clinical indexes [neck disability index (NDI) (a1, a2), neurological success (b), range of motion (ROM) (c), Visual Analogue Score (VAS) (d)]Back to article page