Skip to main content

Table 2 Comparisons on cervical alignment parameters among ACDF, HS1, and HS2

From: Exploration on sagittal alignment and clinical outcomes after consecutive three-level hybrid surgery and anterior cervical discectomy and fusion: a minimum of a 5-year follow-up

 ACDFHS1HS2P
CL at pre-op (°)6.8 ± 14.312.1 ± 11.09.7 ± 15.50.231
CL at 1 week later (°)11.1 ± 10.214.7 ± 9.116.2 ± 10.0a0.237
CL at final follow-up (°)12.6 ± 9.0b16.3 ± 7.4b18.9 ± 11.7b0.113
ΔCL (°)5.9 ± 10.94.2 ± 9.39.2 ± 12.10.538
SVA at pre-op (cm)2.0 ± 1.01.5 ± 1.11.8 ± 0.70.088
SVA at 1 week later (cm)2.6 ± 1.32.2 ± 1.02.4 ± 0.50.375
SVA at final follow-up (cm)1.9 ± 1.21.7 ± 1.11.9 ± 1.50.738
ΔSVA (cm)− 0.1 ± 1.00.3 ± 0.90.1 ± 1.40.406
T1S at pre-op (°)24.1 ± 8.424.0 ± 8.222.1 ± 3.90.881
T1S at 1 week later (°)26.1 ± 8.026.7 ± 7.928.2 ± 6.8aa0.851
T1S at final follow-up (°)26.0 ± 7.326.7 ± 7.426.4 ± 2.6b0.908
ΔT1S (°)1.9 ± 8.72.7 ± 5.94.3 ± 2.10.745
T1SCL at pre-op (°)17.3 ± 9.911.9 ± 9.712.5 ± 13.70.081
T1SCL at 1 week later (°)15.1 ± 8.911.9 ± 9.012.0 ± 13.30.360
T1SCL at final follow-up (°)13.3 ± 9.910.4 ± 7.77.2 ± 9.30.216
ΔT1SCL (°)− 4.0 ± 10.0− 1.5 ± 9.6− 5.2 ± 13.20.506
  1. ACDF anterior cervical discectomy and fusion, HS hybrid surgery, HS1 one prosthesis and two cages, HS2 two prostheses and one cage, CL C2–C7 cervical lordosis, Pre-op preoperation, SVA C2–C7 sagittal vertical axis, T1S T1 slope, T1SCL T1S minus CL
  2. “Δ” is the change of variable at final follow-up compared to baseline
  3. aSignificance on parameters between pre-op and 1 week after surgery (P < 0.05)
  4. aaSignificance on parameters between pre-op and 1 week after surgery (P < 0.01)
  5. bSignificance on parameters between pre-op and final follow-up (P < 0.05)