Comparison of multilevel anterior cervical discectomy and fusion utilizing zero-profile self-locking cages versus the cage-with-plate system: a 5-year-minimum follow-up study.

Similarly, the regression model for subsidence versus NDI improvement, although nominally significant ( B =−0.827; 95% CI, −1.62 to −0.03; standardized β =−0.256; 95% CI, −0.49 to −0.02), explained minimal variance ( R 2 =0.05) and highlighted marginal clinical relevance.

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