Table 2 Sex differences in parameters.

From: The impact of ossification spread on cervical spine function in patients with ossification of the posterior longitudinal ligament

Characteristic

Male (n = 162)

Female (n = 76)

p value

Age (years)

64.0 ± 12.7

63.6 ± 11.5

0.51

BMI (kg/m2)

25.9 ± 4.3

26.1 ± 4.8

0.90

JOA score (points)

12.0 ± 3.5

12.8 ± 3.1

0.19

Neck VAS score

38.8 ± 32.3

38.8 ± 29.2

0.78

Cervical spine function (points)

65.1 ± 29.4

65.9 ± 27.5

0.96

Questions of Q1 domain

Q1-1

2.3 ± 0.7

2.4 ± 0.7

0.25

Q1-2

2.5 ± 0.7

2.5 ± 0.7

0.61

Q1-3

2.1 ± 0.8

2.0 ± 0.8

0.83

Q1-4

2.6 ± 0.6

2.5 ± 0.8

0.09

C-OP-index

6.0 ± 3.1

6.0 ± 3.4

0.81

W-OP-index

7.5 ± 5.1

10.9 ± 8.1

0.006**

Cervical OP-index grade

1.7 ± 0.7

1.6 ± 0.8

0.44

Bridge formation of C-OPLL

0.7 ± 1.2

0.7 ± 1.1

0.76

Bridge formation of W-OPLL

1.1 ± 1.8

2.0 ± 3.0

0.014*

  1. Data are presented as mean ± standard deviation.
  2. BMI body mass index; JOA Japanese Orthopaedic Association; VAS visual analog scale (100-mm). Q1 domain, cervical spine function domain of the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire; C, cervical; W, whole spine; OP-index Ossification index for OPLL; bridge formation, ossified lesions forming a bridge with the posterior border of the adjacent vertebral body.
  3. *p < 0.05; **p < 0.01.
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