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Table 1 Patient characteristics

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

Characteristics Durotomy (n = 15) No durotomy (n = 152) p
Age, median (IQR), y 73 (11) 75 (12) 0.61
Female, n (%) 6 (40) 82 (53.9) 0.45
BMI, median (IQR), kg/m2 26 (8.2) 26.3 (5.8) 0.82
Diabetes mellitus, n (%) 16 (10.5) 2 (13.3) 0.99
Smoker, n (%) 1 (6.7) 13 (8.6) 0.69
Level of education    0.10
 Compulsory education (1–9 years), n (%) 4 (26.7) 32 (21.1)  
 Higher education/vocational training (no university) (10–12 years), n (%) 6 (40) 98 (64.5)  
 University degree, n (%) 5 (33.3) 22 (14.5)  
CIRS, median (IQR) 7 (5.5) 9 (4.5) 0.15
HADS anxiety, median (IQR) 2 (3.5) 4 (4) 0.06
HADS depression, median (IQR) 3 (3) 4 (4.5) 0.13
SSM symptoms, median (IQR) 3.1 (0.5) 3.1 (1) 0.84
SSM functions, median (IQR) 2 (0.8) 2.4 (1) 0.21
NRS, median (IQR) 6 (1.5) 7 (3) 0.76
Feeling thermometer, median (IQR) 70 (22.5) 70 (30) 0.90
EQ-5D-EL sum score, median (IQR) 70 (25) 70 (20) 0.99
EQ-5D-EL actual health status, median (IQR) 80 (34) 65 (40) 0.19
RMDQ, median (IQR) 14 (8) 13 (8) 0.64
Prior lumbar epidural steroid injection, n (%) 7 (46.7) 84 (55.3) 0.71
  1. BMI body mass index, CIRS cumulative illness rating scale, FT feeling thermometer, HADS hospital anxiety and depression scale, IQR interquartile range, NRS numeric rating scale (NRS), RMDQ Roland and Morris disability questionnaire, SSM spinal stenosis measure