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

  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

  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

  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

  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