Fig. 4

Forest plot comparing the rate of SALDRS between TDR and ACDF at 4–5 years follow-up. TDR, cervical total disc replacement; ACDF, anterior cervical discectomy and fusion; CI, confidence interval; df, degrees of freedom; M-H, Mantel-Haenszel
Forest plot comparing the rate of SALDRS between TDR and ACDF at 4–5 years follow-up. TDR, cervical total disc replacement; ACDF, anterior cervical discectomy and fusion; CI, confidence interval; df, degrees of freedom; M-H, Mantel-Haenszel