Table 3.
Joint effect of body mass index and exposure to whole-body vibration at work on risk of hospitalization for sciatica.
| Exposure to vibration | Body Mass Index (kg/m2) | Sample | Event | HR | 95% CI |
|---|---|---|---|---|---|
| No | <25 | 1779 | 56 | 1 | |
| Yes | <25 | 255 | 7 | 0.85 | 0.36–1.99 |
| No | 25–29.9 | 1146 | 29 | 0.96 | 0.61–1.53 |
| Yes | 25–29.9 | 254 | 13 | 1.94 | 0.96–3.93 |
| No | ≥30 | 371 | 8 | 0.93 | 0.44–1.97 |
| Yes | ≥30 | 86 | 7 | 3.50 | 1.44–8.46 |
*P-value for the interaction term of body mass index and exposure to vibration was 0.05.
Hazard ratios (HRs) with 95% confidence intervals (CIs) are adjusted for age, sex, height, smoking, leisure-time physical activity, physical strenuousness of work, lifting, awkward trunk postures, prolonged standing, prolonged sitting, constantly repeated series of movements, and paced work. P-value 0.05.