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Table 4 Changes in main outcomes from baseline to 6, 12, and 24 months: median (IQR)

From: The impact of incidental durotomy on the outcome of decompression surgery in degenerative lumbar spinal canal stenosis: analysis of the Lumbar Spinal Outcome Study (LSOS) data—a Swiss prospective multi-center cohort study

Outcome

Baseline – 6 months

Baseline – 12 months

Baseline – 24 months

 

Durotomy

No durotomy

p

Durotomy

No durotomy

p

Durotomy

No durotomy

p

∆ SSM symptoms

1.1 (0.9)

0.8 (1.3)

0.02

1.1 (0.8)

0.9 (1)

0.19

1.6 (0.9)

0.9 (1)

0.13

∆ SSM function

1 (0.4)

0.6 (1)

0.12

0.8 (0.6)

0.8 (1)

0.53

0.9 (0.6)

0.8 (1.1)

0.48

∆ NRS

4 (2.5)

3 (4)

0.13

4 (2.5)

3 (4)

0.24

5 (1.8)

4 (4.2)

0.22

∆ FT

45 (28.5)

30 (40)

0.08

45 (29)

34.5 (48.2)

0.2

60 (16.2)

34 (39.5)

0.06

∆ EQ-5D-EL sum score

−20 (25)

−10 (30)

0.04

−20 (20)

−20 (30)

0.17

−20 (17.5)

−15 (30)

0.45

∆ EQ-5D-EL ahs

−9 (29.5)

−10 (33.5)

0.97

−5.5 (28.8)

−10 (37.5)

0.83

−6.5 (14)

−10 (35.5)

0.42

∆ RMDQ

6 (7)

3 (6)

0.03

8 (5)

4 (7)

0.01

9.5 (9)

4 (8)

0.02

  1. Ahs actual health status, FT feeling thermometer, NRS numeric rating scale (NRS), RMDQ Roland and Morris disability questionnaire, SSM spinal stenosis measure
  2. Numbers of patients: Baseline – 6 months: 15 patients in the durotomy group, 152 patients in the no durotomy group. No missing values. Baseline – 12 months, 15 patients in the durotomy group, 152 patients in the no durotomy group. No missing values in SSM subscales, single missing values in some secondary outcomes. Baseline – 24 months, 11 patients in the durotomy group, 90 patients in the no durotomy group for SSM subscales. Single missing values in some outcomes