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Table 1 Demographic characteristics and clinical data of 45 patients with lumbar spinal stenosis (LSS)

From: Percutaneous transforaminal full endoscopic decompression for the treatment of lumbar spinal stenosis

Characteristics   Men
n = 20 (%)
Women
n = 25 (%)
P Total
N = 45 (%)
Age (yrs) mean ± S.D. 59.90 ± 9.60 62.80 ± 7.22 0.192 61.51 ± 8.38
BMI (kg/m2) mean ± S.D. 22.70 ± 2.82 22.11 ± 2.94 0.385 22.37 ± 2.87
Spinal instability     1  
  Yes 4 (20.0) 6 (24.0)   10 (22.2)
No 16 (80.0) 19 (76.0)   35 (77.8)
Revision surgery      
  Yes 4 (20.0) 4 (16.0) 1 8 (17.8)
No 16 (80.0) 21 (84.0)   37 (82.2)
Type of spinal stenosis     0.104  
  Foraminal stenosis 2 (10.0) 8 (32.0)   10 (22.2)
Lateral recess stenosis 13 (65.0) 9 (36.0)   22 (48.9)
Central stenosis 5 (25.0) 8 (32.0)   13 (28.9)
Stenosis grade     0.611  
  Mild 5 (25.0) 9 (36.0)   14 (31.1)
Moderate 10 (50.0) 9 (36.0)   19 (42.2)
Severe 5 (25.0) 7 (28.0)   12 (26.7)
Coexisting disease      
  LSS alone 8 (40.0) 12 (48.0) 0.764 20 (44.4)
Hypertension 5 (25.0) 10 (40.0) 0.352 15 (33.3)
Diabetes 5 (25.0) 2 (8.0) 0.214 7 (15.6)
Rheumatoid arthritis 0 (0) 2 (8.0) 0.495 2 (4.4)
Coronary heart disease 4 (20.0) 4 (16.0) 1 8 (17.8)
Osteoarthritis 4 (20.0) 1 (4.0) 0.155 5 (11.1)
Level of decompressed disc     0.017  
  L3–4 4 (20.0) 0 (0)   4 (8.9)
L4–5 6 (30.0) 16 (64.0)   22 (48.9)
L5-S1 10 (50.0) 9 (36.0)   19 (42.2)
Complication Transient dysesthesia 1 (5.0) 1 (4.0) 1 2 (4.4)
Recurrent stenosis     0.383  
  Yes 4 (20.0) 2(8.0)   6(13.3)
No 16(80.0) 23(92.0)   39(86.7)
Preoperative
 VAS-back mean ± S.D. 6.92 ± 1.30 6.52 ± 1.00 0.153 6.7 ± 1.15
 VAS-leg mean ± S.D. 7.18 ± 0.82 6.88 ± 0.85 0.265 7.01 ± 0.84
 ODI scores (%) mean ± S.D. 47.70 ± 10.31 44.96 ± 9.99 0.403 46.18 ± 10.17
Postoperative 1 yr
 VAS-back mean ± S.D. 2.72 ± 1.15 2.46 ± 1.08 0.464 2.58 ± 1.11
 VAS-leg mean ± S.D. 2.60 ± 1.50 2.02 ± 1.35 0.243 2.28 ± 1.43
 ODI scores (%) mean ± S.D. 14.80 ± 9.48 14.08 ± 9.86 0.764 14.40 ± 9.59
  1. BMI body mass index, VAS visual analog scale, ODI Oswestry disability index, Values expressed as the mean ± S.D