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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

 

ACDF

HS1

HS2

P

ROM at pre-op (°)

38.6 ± 10.3

44.7 ± 13.4

40.5 ± 10.6

0.153

ROM at final follow-up (°)

24.0 ± 6.3bb

29.0 ± 9.1bb

32.7 ± 9.9b

0.124

ΔROM

− 16.2 ± 10.0

− 15.8 ± 14.3

− 7.8 ± 8.5

0.488

UROM at pre-op (°)

9.8 ± 4.7

9.3 ± 4.4

8.7 ± 3.4

0.867

UROM at final follow-up (°)

11.6 ± 4.0

8.4 ± 3.3

8.5 ± 4.9

0.044

ΔUROM

1.7 ± 7.0

− 1.0 ± 4.7

− 0.3 ± 4.0

0.389

LROM at pre-op (°)

6.9 ± 3.6

6.5 ± 4.3

5.9 ± 3.1

0.858

LROM at final follow-up (°)

9.6 ± 3.3

4.9 ± 3.8

6.4 ± 3.1

0.002

ΔLROM

1.8 ± 6.4b

− 2.1 ± 4.0

0.1 ± 2.9

0.078

OPCL at pre-op (°)

3.3 ± 10.9

8.2 ± 8.5

1.7 ± 12.7

0.106

OPCL at final follow-up (°)

9.4 ± 7.0

13.8 ± 7.6

11.9 ± 13.8

0.142

ΔOPCL

6.9 ± 10.0b

5.2 ± 8.0bb

8.2 ± 7.6b

0.688

ASD (n)

20

22

17

0.707

Upper ASD (n)

6

13

9

0.224

Lower ASD (n)

14

14

10

0.916

  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)