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Table 3 Relationship between obesity and body composition and low back disability

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

  Male Female
Number Low disability
OR (95% CI)
High disability
OR (95% CI)
P between -group variability (low/high) Number Low disability
OR (95% CI)
High disability
OR (95% CI)
P between group variability (low/high)
Model 1
 Obesity measures
  BMI (per 5 kg/m2) 1 1.04 (0.88–1.22) 1.44 (1.20–1.74) 0.002 1 1.25 (1.13–1.39) 1.49 (1.33–1.66) 0.01
  Waist circumference (per 10 cm)a 1 1.15 (1.00–1.32) 1.36 (1.17–1.61) 0.05 1 1.23 (1.12–1.35) 1.39 (1.27–1.54) 0.03
 Body composition measures
  Percent fat (per 10%) 1 1.12 (0.94–1.34) 1.42 (1.14–1.77) 0.05 1 1.21 (1.08–1.35) 1.52 (1.35–1.72) 0.002
  Fat mass (per 10 kg)b 1 1.08 (0.94–1.24) 1.30 (1.11–1.52) 0.03 1 1.18 (1.09–1.28) 1.34 (1.23–1.47) 0.02
  Fat-free mass (per 10 kg)b 1 0.92 (0.73–1.17) 0.86 (0.65–1.14) 0.66 1 1.05 (0.82–1.33) 0.89 (0.69–1.16) 0.28
Model 2
 Obesity measures
  BMI (per 5 kg/m2) 1 1.02 (0.86–1.21) 1.39 (1.15–1.68) 0.004 1 1.25 (1.12–1.39) 1.45 (1.29–1.62) 0.02
  Waist circumference (per 10 cm)a 1 1.13 (0.98–1.30) 1.32 (1.12–1.56) 0.08 1 1.23 (1.11–1.35) 1.37 (1.23–1.52) 0.04
 Body composition measures
  Percent fat (per 10%) 1 1.11 (0.92–1.32) 1.37 (1.10–1.72) 0.07 1 1.20 (1.07–1.35) 1.48 (1.31–1.68) 0.004
  Fat mass (per 10 kg)b 1 1.07 (0.93–1.23) 1.28 (1.09–1.51) 0.04 1 1.18 (1.09–1.28) 1.32 (1.21–1.45) 0.04
  Fat-free mass (per 10 kg)b 1 0.93 (0.73–1.18) 0.85 (0.63–1.13) 0.61 1 1.09 (0.85–1.39) 0.93 (0.72–1.22) 0.29
  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