Table 1 Patient characteristics in each group

Number of cases

20

16

Age (years)

67.2 ± 12.5 (35–86)

67.8 ± 10.3 (49–84)

BMI

24.6 ± 5.0 (17.5–36.0)

24.5 ± 3.7 (19.2–33.2)

Sex (Male / Female)

12 / 8

13 / 3

Smoking (Never / Past / Now)

8 / 9 / 3

5 / 8 / 3

Cause of disorder (CSM/OPLL)

17 / 3

11 / 5

Past history of diabetes (+/−)

5 / 15

8 / 8

JOA before surgery

9.8 ± 2.8 (5–14.5)

11.0 ± 2.2 (6–14)

 ADF

11

10

 LMP

6

4

 PDF

3

2