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Table 1 Preoperative comparison between Allograft and PEEK groups

From: A comparison of contiguous two-level anterior cervical discectomy and fusion using a structural allograft versus a Polyetheretherketone (PEEK) cage: the results of a three-year follow-up

Demographics

Allograft

(n = 53)

PEEK

(n = 35)

p-value

Male

27 (50.9)

19 (54.3)

0.759

Age (years)

52.4

56.0

 

Median (IQR)

(45.2–62.1)

(48.2–63.2)

0.188

BMI

25.0

25.0

 

Median (IQR)

(22.7–27.1)

(23.1–28.2)

0.617

Current smoker

6 (11.5)

4 (11.8)

1.000

Symptom

  

0.335

 Radiculopathy

20 (37.7)

8 (22.9)

 

 Myelopathy

20 (37.7)

17 (48.6)

 

 Radiculomyelopathy

13 (24.5)

10 (28.6)

 

Level

  

0.141

 C3–4/C4–5

3 (5.7)

5 (14.3)

 

 C4–5/C5–6

14 (26.4)

12 (34.3)

 

 C5–6/C6–7

36 (67.9)

16 (45.7)

 

 C3–4/C5–6*

0 (0.0)

1 (2.9)

 

 C4–5/C6–7*

0 (0.0)

1 (2.9)

 

Clinical baseline

 NPD

31.3 ± 20.0

39.9 ± 26.8

0.111

 AAOS-NSS

47.7 ± 25.9

49.6 ± 29.8

0.746

 NDI

30.3 ± 20.6

38.9 ± 25.1

0.083

 VASNP

4.8 ± 3.5

4.6 ± 3.4

0.751

 VASLP

4.1 ± 3.9

2.7 ± 3.2

0.067

 JOA

13.7 ± 1.9

11.3 ± 4.3

0.008

Radiology baseline

 Cervical cobb angle

7.24 ± 11.97

10.96 ± 9.80

0.130

Cephalic level

 Mean Disc Height

3.47 ± 1.07

3.97 ± 1.25

0.048

 Segmental height

31.32 ± 3.66

31.57 ± 4.11

0.769

 Segmental Cobb angle

−1.19 ± 5.83

2.30 ± 6.66

0.011

Caudad level

 Mean Disc Height

3.58 ± 1.09

3.76 ± 1.74

0.575

 Segmental height

32.27 ± 3.51

31.10 ± 3.41

0.125

 Segmental Cobb angle

3.41 ± 4.77

2.25 ± 6.06

0.322

  1. *Small frequency – excluded in the calculation of p-value
  2. NPD Neck pain and disability; AAOS-NSS AAOS neurogenic symptom score; NDI Neck Disability Index; VASNP Visual analog score neck pain; VASLP Visual analog score limp pain; JOA Japanese Orthopedic Association Score;