Table 4.
Low back pain intensity and disability in relation to measures of sex-specific quartiles
| 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 |
Adjusted for age, sex, education, smoking status, Socio-Economic Indexes for Areas (SEIFA) and mental component score of SF-36
OR odds ratio, CI confidence level
aAdjusted for fat-free mass
bCo-adjusted for each other