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Table 4 BMI category as prognostic factor for disability (ODI/NDI) at the end of treatment

From: Obesity is associated with more disability at presentation and after treatment in low back pain but not in neck pain: findings from the OIOC registry

  BMI category Beta (95 % CI) p-value
LBPa Lean (reference)  
  Underweight −4.92 (−18.1; 8.27) 0.45
  Overweight −3.90 (−7.4;−0.41) 0.03
  Obesity class I −0.83 (−6.1; 4.46) 0.76
  Obesity class II–III 3.43 (−3.81; 10.68) 0.35
  ODI baseline 0.59 (0.49; 0.69) <0.001
  FAB-P high 7.76 (4.39; 11.13) <0.001
  FAB-W high −0.82 (−7.1; 5.4) 0.79
  FAB-W high NA 2.42 (−2.69)7.53) 0.35
  No relationship 3.03 (−0.43; 6.49) 0.09
  Work-related RF 3.03 (−2.25; 8.32) 0.25
  Chronic pain 4.49 (0.34; 8.64) 0.03
  Treatment duration 0.04 (−0.02; 0.09) 0.16
NPa Lean (reference)  
  Underweight −0.23 (−6.58; 6.12) 0.94
  Overweight 0.91 (−2.23; 4.05) 0.57
  Obesity class I −0.46 (−5.39; 4.48) 0.85
  Obesity class II–III −4.65 (−11.98; 2.69) 0.21
  NDI baseline 0.61 (0.43; 0.78) <0.001
  Work-related RF 4.07 (−0.35; 8.48) 0.07
  Treatment duration 0.03 (−0.02; 0.08) 0.25
  1. Positive Beta coefficient indicates less decrease in ODI/NDI; negative Beta coefficient indicates more decrease in ODI/NDI than in the reference group (lean patients)
  2. aNo significant interactions between BMI and other potential prognostic factors were found for low back and neck pain patients
  3. All confounders included in the final model changed the influence of BMI on the outcome ODI/NDI at least 10 % in univariate comparison