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Table 4 Low back pain intensity and disability in relation to measures of sex-specific quartiles

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

  Q1 Q2 Q3 Q4 P for trend
Low back pain intensity, OR (95% CI)
 Men
  Obesity measures
   Body mass index 1 1.47 (1.14–1.88) 1.75 (1.36–2.25) 1.50 (1.16–1.93) 0.001
   Waist circumferencea 1 1.43 (1.10–1.84) 1.78 (1.36–2.34) 1.50 (1.12–2.00) 0.003
  Body composition measures
   Percent fat 1 1.58 (1.23–2.03) 1.64 (1.28–2.12) 1.61 (1.25–2.08) <0.001
   Fat massb 1 1.78 (1.38–2.30) 1.91 (1.46–2.51) 1.51 (1.14–1.99) 0.02
   Fat-free massb 1 0.88 (0.68–1.14) 0.89 (0.68–1.16) 1.00 (0.76–1.33) 0.43
 Women
  Obesity measures
   Body mass index 1 1.25 (1.01–1.56) 1.25 (1.00–1.56) 1.92 (1.53–2.41) <0.001
   Waist circumferencea 1 1.20 (0.96–1.50) 1.42 (1.13–1.78) 2.09 (1.65–2.65) <0.001
  Body composition measures
   Percent fat 1 1.01 (0.81–1.26) 1.21 (0.96–1.51) 1.79 (1.42–2.24) <0.001
   Fat massb 1 1.05 (0.84–1.32) 1.25 (1.00–1.57) 1.78 (1.42–2.24) <0.001
   Fat-free massb 1 0.85 (0.68–1.06) 0.94 (0.75–1.17) 0.79 (0.63–0.99) 0.01
Low back pain disability, OR (95% CI)
 Men
  Obesity measures
   Body mass index 1 1.12 (0.82–1.53) 1.13 (0.83–1.54) 1.31 (0.96–1.79) 0.001
   Waist circumferencea 1 1.59 (1.15–2.21) 1.29 (0.91–1.83) 1.85 (1.28–2.66) 0.003
  Body composition measures
   Percentage fat 1 1.12 (0.82–1.54) 1.20 (0.87–1.64) 1.37 (1.00–1.88) 0.04
   Fat massb 1 1.20 (0.87–1.66) 1.26 (0.90–1.76) 1.45 (1.02–2.05) 0.04
   Fat-free massb 1 1.00 (0.73–1.37) 0.75 (0.54–1.05) 0.78 (0.55–1.12) 0.07
 Women
  Obesity measures
   Body mass index 1 1.36 (1.01–1.83) 1.58 (1.18–2.12) 2.56 (1.93–3.40) <0.001
   Waist circumferencea 1 1.16 (0.86–1.58) 1.53 (1.15–2.06) 2.50 (1.86–3.34) <0.001
  Body composition measures
   Percent fat 1 1.08 (0.80–1.45) 1.49 (1.12–1.99) 2.15 (1.63–2.85) <0.001
   Fat massb 1 1.07 (0.79–1.45) 1.37 (1.03–1.83) 2.30 (1.74–3.04) <0.001
   Fat-free massb 1 1.20 (0.91–1.58) 1.16 (0.88–1.54) .92 (0.69–1.22) 0.86
  1. Adjusted for age, sex, education, smoking status, Socio-Economic Indexes for Areas (SEIFA) and mental component score of SF-36
  2. OR odds ratio, CI confidence level
  3. aAdjusted for fat-free mass
  4. bCo-adjusted for each other