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Table 3 Comparisons on anatomic radiographic parameters and ASD 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
ROM at pre-op (°)38.6 ± 10.344.7 ± 13.440.5 ± 10.60.153
ROM at final follow-up (°)24.0 ± 6.3bb29.0 ± 9.1bb32.7 ± 9.9b0.124
ΔROM− 16.2 ± 10.0− 15.8 ± 14.3− 7.8 ± 8.50.488
UROM at pre-op (°)9.8 ± 4.79.3 ± 4.48.7 ± 3.40.867
UROM at final follow-up (°)11.6 ± 4.08.4 ± 3.38.5 ± 4.90.044
ΔUROM1.7 ± 7.0− 1.0 ± 4.7− 0.3 ± 4.00.389
LROM at pre-op (°)6.9 ± 3.66.5 ± 4.35.9 ± 3.10.858
LROM at final follow-up (°)9.6 ± 3.34.9 ± 3.86.4 ± 3.10.002
ΔLROM1.8 ± 6.4b− 2.1 ± 4.00.1 ± 2.90.078
OPCL at pre-op (°)3.3 ± 10.98.2 ± 8.51.7 ± 12.70.106
OPCL at final follow-up (°)9.4 ± 7.013.8 ± 7.611.9 ± 13.80.142
ΔOPCL6.9 ± 10.0b5.2 ± 8.0bb8.2 ± 7.6b0.688
ASD (n)2022170.707
Upper ASD (n)61390.224
Lower ASD (n)1414100.916
  1. ACDF anterior cervical discectomy and fusion, HS hybrid surgery, HS1 one prosthesis and 2 cages HS2, two prostheses and one cage ROM, cervical range of motion, Pre-op, preoperation, UROM ROM of upper adjacent segment, LROM ROM of lower adjacent segment OPCL, cervical lordosis of operated segment, ASD adjacent segment degeneration
  2. “Δ” is the change of variable at final follow-up compared to baseline
  3. bSignificance on parameters between pre-op and final follow-up (P < 0.05)
  4. bbSignificance on parameters between pre-op and final follow-up (P < 0.01)