Table 2.
The relationship between body composition and any high intensity low back pain during the study, after adjustment for confounders
| Multivariable odds ratioa | 95% CI | p value | |
|---|---|---|---|
| BMIb | 1.10 | 1.05–1.17 | < 0.001 |
| Fat mass | |||
| Total | 1.05 | 1.01–1.09 | 0.01 |
| Trunk | 1.11 | 1.04–1.20 | 0.003 |
| Upper limb | 1.44 | 1.07–1.93 | 0.02 |
| Lower limb | 1.09 | 1.00–1.19 | 0.05 |
| Android | 1.60 | 1.13–2.26 | 0.008 |
| Gynoid | 1.30 | 1.04–1.61 | 0.02 |
| Android to gynoid ratio (%)c | 1.04 | 1.01–1.08 | 0.009 |
| Lean tissue mass | |||
| Total | 1.00 | 0.93–1.08 | 0.92 |
| Upper limb | 1.59 | 0.92–2.74 | 0.10 |
| Lower limb | 1.05 | 0.85–1.28 | 0.67 |
| Fat to lean mass ratiosc | |||
| Total body fat to lean mass ratio (per 10 kg) | 1.33 | 1.13–1.58 | 0.001 |
| Upper limb fat to lean mass ratio (per 10 kg) | 1.21 | 1.05–1.40 | 0.008 |
| Lower limb fat to lean mass ratio (per 10 kg) | 1.20 | 1.05–1.37 | 0.007 |
aRelationship between body composition and any high intensity back pain (at any time point), adjusted for age, gender, strenuous physical activity, and fat or lean tissue mass measure, in addition to mental health component score (from SF-36). When performing multivariable analyses for fat mass (total, trunk, android, and gynoid), total lean tissue mass was included as a potential confounder. When performing multivariable analyses for upper and lower limb fat mass, lean tissue mass in the upper and lower limb respectively was included as a potential confounder
bBMI adjusted for age, gender, strenuous physical activity, and mental health component score (from SF-36)
cAll ratios were adjusted for age, gender, strenuous physical activity, and mental health component score (from SF-36)