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Table 3 Pain, disability scores, and complications

From: Posterolateral fusion combined with posterior decompression shows superiority in the treatment of severe lumbar spinal stenosis without lumbar disc protrusion or prolapse: a retrospective cohort study

Parameters

PLF group (n = 77)

CF group (n = 76)

P

Low back pain, VAS score (range)

 Preoperative

6.0 (4.0, 7.0)

5.0 (4.0, 6.0)

NS

 3 months

2.0 (1.0, 2.0)

1.0 (1.0, 2.0)

NS

 6 months

1.0 (1.0, 1.0)

1.0 (1.0, 1.0)

NS

 1 year

1.0 (1.0, 1.0)

1.0 (0, 1.0)

NS

 2 years

1.0 (0, 1.0)

1.0 (0, 1.0)

NS

Radicular pain, VAS score (range)

 Preoperative

8.0 (7.0, 8.0)

8.0 (7.0, 8.0)

NS

 3 months

1.0 (1.0, 2.0)

1.0 (1.0, 1.0)

NS

 6 months

1.0 (1.0, 1.0)

1.0 (0, 1.0)

NS

 1 year

1.0 (0, 1.0)

0 (0, 1.0)

NS

 2 years

0 (0, 1.0)

0 (0, 1.0)

NS

JOA (range)

 Preoperative

13.0 (13.0, 14.0)

14.0 (13.0, 15.0)

NS

 3 months

24.0 (23.0, 24.0)

24.0 (23.0, 25.0)

NS

 6 months

25.0 (24.0, 26.0)

25.0 (25.0, 26.0)

NS

 1 year

25.0 (24.0, 26.0)

26.0 (25.0, 26.0)

NS

 2 years

26.0 (25.0, 26.0)

25.0 (24.0, 27.0)

NS

ODI (range)

 Preoperative

54.0 (52.2, 59.4)

54.9 (50.4, 57.6)

NS

 3 months

14.4 (12.6, 16.2)

12.6 (9.0, 16.2)

NS

 6 months

10.8 (9.0, 14.4)

12.6 (9.0, 14.4)

NS

 1 year

10.8 (7.2, 12.6)

9.9 (7.2, 10.8)

NS

 2 years

9.0 (7.2, 10.8)

7.2 (5.4, 10.8)

NS

Postoperative complications (n)

1

7

  1. Discontinuous variables (VAS, JOA, and ODI) were not exactly normally distributed. Wilcoxon signed rank test was considered appropriate for testing the differences between the two groups and within each group. Fisher’s exact test was used to calculate differences in categorical variables (postoperative complications). VAS, JOA, and ODI were expressed as the median (interquartile range)
  2. NS no significant difference
  3. ※, P < 0.05