Table 3

Cumulative risk of subsequent surgery and treatment-related adverse events at 10 y after CDA or ACDF.

OutcomeCDA (N = 105)ACDF (N = 50) P Valueb
% (n)a 95% CI% (n)a 95% CI
Any subsequent surgery7.2% (7)2.7%–13.3%25.5% (13)14.6%–40.3% 0.001
Adjacent-level surgery3.1% (3)0.6%–7.5%20.5% (9)10.0%–33.6% 0.0005
Index-level surgery5.2% (5)1.7%–10.6%10.5% (7)3.5%–20.7%0.18
Treatment-related adverse events18.6% (18)11.4%–27.1%32.2% (15)19.4%–46.5% 0.024

  • Significant P values indicated in bold.

  • ↵a Number of patients with event through 10 y.

  • ↵b Log-rank test comparing survival functions.

  • ACDF, anterior cervical discectomy and fusion; CDA, cervical disc arthroplasty.