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Table 2 Relationship between obesity and body composition and intensity of low back pain

From: Fat mass and fat distribution are associated with low back pain intensity and disability: results from a cohort study

  Male Female
Number Low-intensity pain High-intensity pain P between group Number Low-intensity pain High-intensity pain P between group
OR (95% CI) OR (95% CI) variability (low/high)   OR (95% CI) OR (95% CI) variability (low/high)
Model 1
 Obesity measures
  BMI (per 5 kg/m2) 1 1.24 (1.07–1.44) 1.42 (1.18–1.71) 0.08 1 1.17 (1.05–1.30) 1.43 (1.26–1.62) <0.001
  Waist circumference (per 10 cm)a 1 1.11 (0.98–1.26) 1.26 (1.08–1.47) 0.02 1 1.14 (1.04–1.25) 1.38 (1.24–1.54) <0.001
 Body composition measures
  Percent fat (per 10%) 1 1.27 (1.08–1.49) 1.45 (1.20–1.76) 0.06 1 1.11 (1.00–1.23) 1.41 (1.25–1.59) <0.001
  Fat mass (per 10 kg)a 1 1.10 (0.96–1.26) 1.22 (1.04–1.42) 0.01 1 1.10 (1.01–1.19) 1.28 (1.16–1.41) <0.001
  Fat-free mass (per 10 kg)a 1 1.20 (0.98–1.48) 1.20 (0.93–1.56) 0.69 1 1.18 (0.94–1.48) 0.72 (0.54–0.96) <0.001
Model 2
 Obesity measures
  BMI (per 5 kg/m2) 1 1.25 (1.07–1.45) 1.41 (1.17–1.70) 0.01 1 1.17 (1.05–1.30) 1.39 (1.22–1.59) <0.001
  Waist circumference (per 10 cm)a 1 1.11 (0.98–1.27) 1.25 (1.07–1.46) 0.06 1 1.13 (1.03–1.24) 1.36 (1.22–1.52) <0.001
 Body composition measures
  Percent fat (per 10%) 1 1.28 (1.09–1.51) 1.45 (1.19–1.77) 0.01 1 1.41 (1.25–1.59) 1.39 (1.22–1.57) <0.001
  Fat mass (per 10 kg)b 1 1.11 (0.97–1.27) 1.23 (1.05–1.44) 0.18 1 1.28 (1.16–1.41) 1.27 (1.15–1.40) <0.001
  Fat-free mass (per 10 kg)b 1 1.19 (0.97–1.47) 1.15 (0.88–1.50) 0.77 1 0.72 (0.54–0.96) 0.75 (0.56–1.01) <0.001
  1. Model 1: adjusted for age, education, smoking status, Socio-Economic Indexes for Areas (SEIFA), model 2: all the variables in model 1 and mental component score of SF-36
  2. OR odds ratio, CI confidence level, BMI body mass index
  3. aAdjusted for fat-free mass
  4. bCo-adjusted for each other