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Table 5 Univariate analysis of risk factors associated with bone resorption

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

  OR (95% CI) p
Age, y 1 (0.96,1.05) .926
Gender
Female 1  
Male 0.3 (0.08,1.15) .079
BMI, kg/m2 1.22 (0.99,1.49) .056
Smoking
Never smoked 1  
Light smokers 0.63 (0.12,3.3) .589
Severe smokers 0.29 (0.05,1.57) .150
Osteoporosis NA  
Lumbar lordosis,
<50 1  
≥50 0.14(0.03,0.57) .006*
L4-5 spinous height
≤20 1  
20-30 2.57 (0.25,26.24) .426
30-40 0.36 (0.08,1.64) .186
≥40 0.86 (0.12,6.01) .877
L4-5 interspinous height
≤25 1  
25-30 0.38 (0.06,2.53) .318
30-35 0.52 (0.08,3.36) .496
≥35 0.86 (0.05,13.48) .913
Operating time, h 1.46 (0.37,5.82) .589
Blood loss, mL 1 (1,1.01) .261
Hospital stay, d 1.25 (0.98,1.6) .067
Time wearing brace, mo
≤3 1  
4-5 2.18 (0.19,25.01) .531
≥6 1.82 (0.49,6.76) .372
Time performing low back muscle exercises, mo
0 1  
≤3 NA  
3-6 0.77 (0.16,3.74) .745
≥7 1.03 (0.19,5.51) .976
  1. BMI, body mass index; OR, odds ratio; CI, confidence interval.
  2. *p <0.05, indicates significantly associated with bone resorption.