Skip to main content

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