Table 4 Dose-response analysis of LBP in relation the categorical predictor variables based on multivariate logistic regression including all variables (age, sex, smoking, alcohol consumption and BMI). Odds ratios with 95% confidence intervals for LBP. Statistically significant findings indicated in bold.
1994 LBP >30 days past year. n = 588 | 2002 LBP >30 days past year. n = 636 | 2002 OR for LBP > 30 days past year in incidence cases*. n = 314 | ||
|---|---|---|---|---|
Smoking | 0 cig./day | 1.00 | 1.00 | 1.00 |
1–10 cig./day | 1.38 (1.02–1.88) | 1.60 (1.16–2.20) | 1.76 (1.10–2.82) | |
11–20 cig./day | 2.00 (1.53–2.63) | 2.13 (1.57–2.88) | 2.12 (1.30–3.46) | |
>20 cig./day | 6.38 (2.66–15.35) | 4.00 (1.11–14.48) | - | |
Alcohol consumption | <0.2 units/day | 1.00 | 1.00 | 1.00 |
0.2–0.6 units/day | 1.29 (1.00–1.65) | 0.76 (0.59–0.97) | 0.82 (0.57–1.18) | |
0.6–1.0 units/day | 1.41 (1.02–1.93) | 0.71 (0.51–0.98) | 0.82 (0.49–1.38) | |
> 1.0 units/day | 1.58 (1.14–2.19) | 0.85 (0.60–1.20) | 1.25 (0.76–2.06) | |
BMI | < 17 kg/m2 | 1.00 | 1.00 | 1.00 |
17–23.9 kg/m2 | 1.00 (0.62–1.59) | 1.00 (0.73–1.38) | 0.91 (0.65–1.29) | |
24–28.9 kg/m2 | 1.41 (0.82–2.43) | 1.10 (0.72–1.69) | 1.21 (0.70–2.09) | |
= 29 kg/m2 | 1.01 (0.41–2.49) | 1.26 (0.61–2.61) | 1.33 (0.45–3.94) |