Mean effects (95% CI)* of welding fume exposure on baseline to 6 hours post-baseline changes in levels of systemic inflammatory markers
| Crude model | Adjusted model | |||
|---|---|---|---|---|
| C-reactive protein, mg/l | 0.24 | (−0.08 to 0.56) | 0.17 | (−0.17 to 0.51) |
| Fibrinogen, mg/dl | −24§ | (−48 to 1) | −24§ | (−51 to 3) |
| White blood cells, ×103/μl | 0.5§ | (−0.1 to 1.1) | 0.6‡ | (0 to 1.3) |
| Absolute neutrophils, ×103/μl | 0.6‡ | (0.01 to 1.1) | 0.7‡ | (0.1 to 1.3) |
| Relative neutrophils, % | 3§ | (−0.3 to 7) | 4§ | (−0.2 to 8) |
| Adjusted model† with interaction term for smoking status | ||||
|---|---|---|---|---|
| Non-smokers | Smokers | |||
| *To account for repeated measurements, mean (95% CI) changes across the workday were calculated using mixed models. | ||||
| †Models adjusted for centred age and smoking status. | ||||
| ‡p<0.05; §p<0.10. | ||||
| C-reactive protein, mg/l | 0.17 | (−0.22 to 0.56) | 0.20 | (−0.60 to 1.00) |
| Fibrinogen, mg/dl | −32‡ | (−63 to −1) | 8 | (−55 to 70) |
| White blood cells, ×103/μl | 0.8‡ | (0.1 to 1.6) | 0.01 | (−1.5 to 1.5) |
| Absolute neutrophils, ×103/μl | 1.0‡ | (0.4 to 1.7) | −0.4 | (−1.7 to 0.9) |
| Relative neutrophils, % | 6‡ | (1 to 10) | −3 | (−12 to 6) |