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Table 1 Patient demographic and clinical data

From: Bone resorption during the first year after implantation of a single-segment dynamic interspinous stabilization device and its risk factors

  Bone resorption (n = 29) Nobone resorption (n = 15) p
Age, y 42.8 ± 15.0 42.4 ± 14.5 .928
Gender    .139
Female 16 (55.2) 4 (26.7)  
Male 13 (44.8) 11 (73.3)  
BMI, kg/m2 25.7 ± 2.7 23.5 ± 4.5 .097
Smoking    .260
Never smoked 21 (72.4) 8 (53.3)  
Light smokers 5 (17.2) 3 (20.0)  
Severe smokers 3 (10.3) 4 (26.7)  
Osteoporosis 7 (24.1) 0 (0.0) .077
Lumbar lordosis, 39.19 ± 13.85 44.53 ± 15.15 .248
<50 24 (82.8) 6 (40.0) .007*
≥50 5 (17.2) 9 (60.0)  
L4-5 spinous height    .368
≤20 14 (48.3) 6 (40.0)  
20-30 6 (20.7) 1 (6.7)  
30-40 5 (17.2) 6 (40.0)  
≥40 4 (13.8) 2 (13.3)  
L4-5 Interspinous height    .775
≤25 7 (24.1) 2 (13.3)  
25-30 8 (27.6) 6 (40.0)  
30-35 11 (37.9) 6 (40.0)  
≥35 3 (10.3) 1 (6.7)  
  1. BMI, body mass index.
  2. Data are presented as mean ± standard deviation or counts (percentage).
  3. *p < .05, indicates a significant difference between groups.