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Table 1 Baseline characteristics of the study group

From: Obese people benefit from lumbar spinal stenosis surgery as much as people of normal weight

  Normal weight
< 25
N = 106
Overweight
25.0–29.9
N = 154
Obese
≥30
N = 99
P value
BMI, mean (SD) 22.7 (1.9) 27.5 (1.4) 33.8 (3.2) ..
Female, n (%) 63 (59) 78 (51) 55 (56) 0.37
Age, mean (SD) 70 (12) 70 (10) 67 (13) 0.063
Diagnosis, n (%)     0.31
 Central spinal stenosis without olisthesis (≤ 3 mm) 58 (55) 95 (62) 63 (64)  
 Central spinal stenosis with olisthesis (> 3 mm) 36 (34) 38 (25) 21 (21)  
 Lateral stenosis 12 (11) 21 (14) 15 (15)  
Duration of back pain, n (%)     0.86
 No pain 5 (5) 5 (3) 2 (2)  
 Less than 3 months 7 (7) 10 (7) 4 (4)  
 3–12 months 27 (26) 35 (24) 28 (29)  
 1–2 years 17 (16) 22 (15) 17 (17)  
 Over 2 years 49 (47) 72 (50) 47 (48)  
Duration of leg pain, n (%)     0.71
 No pain 3 (3) 4 (3) 3 (3)  
 Less than 3 months 9 (8) 10 (7) 7 (7)  
 3–12 months 32 (30) 47 (31) 28 (29)  
 1–2 years 26 (25) 32 (21) 19 (19)  
 Over 2 years 36 (34) 59 (39) 41 (42)  
Smoker, n (%) 12 (11) 19 (13) 8 (8) 0.56
VAS, mean (SD)     
 Back 52 (28) 55 (26) 57 (28) 0.49
 Leg 56 (26) 61 (25) 60 (25) 0.28
Regular pain medication, n (%) 56 (53) 80 (52) 55 (56) 0.85
Walking distance < 0.5 km 62 (58) 96 (62) 82 (83) 0.007