Table 2.
Linear regression model of welding fume concentration (ln(mg/m3) on space and ventilation characteristics (n=65).
| exp(β)* | exp(SE)* | p | exp(95% CI)* | ||
|---|---|---|---|---|---|
| Intercept | 0.51 | 1.74 | 0.23 | (0.17, 1.54) | |
| Proximity of Breathing Zone to Fume | |||||
| Away | - | - | - | - - | |
| Near | 2.62 | 1.40 | 0.01 | (1.33, 5.16) | |
| In | 2.90 | 1.55 | 0.02 | (1.21, 6.94) | |
| Welding Method | |||||
| SMAW | - | - | - | - - | |
| FCAW (Inner Shield) | 4.33 | 1.79 | 0.02 | (1.35, 13.93) | |
| FCAW (Dual Shield) | 5.23 | 2.20 | 0.04 | (1.07, 25.43) | |
| Oxyacetylene | 0.60 | 2.08 | 0.48 | (0.14, 2.58) | |
| Mixing | |||||
| No | - | - | - | - - | |
| Yes | 0.46 | 1.38 | 0.02 | (0.24, 0.87) | |
*
Values have been exponentiated to represent the ratio of the breathing zone concentration in the specified group relative to the concentration of the reference group.