Table 5. Trend testa for significantly increased lung cancer risk with highest monthly exposure.
| Highest monthly exposures retained (mg/m3) | β (mg/m3-years)−1 | P-valuea | |
|---|---|---|---|
| MLE | 95% CI | ||
| ⩽0.052 | 1.2 | (−7.9, 8.4) | 0.76 |
| ⩽0.104 | −1.3 | (−6.4, 1.5) | 0.43 |
| ⩽0.156 | 0.31 | (−1.7, 1.7) | 0.72 |
| ⩽0.208 | 0.31 | (−1.7, 1.7) | 0.72 |
| ⩽0.26 | 0.73 | (0.07, 1.2) | 0.03 |
| ⩽0.312 | 0.35 | (−0.092, 0.71) | 0.11 |
| ⩽0.416 | 0.01 | (−0.41, 0.34) | 0.97 |
| ⩽0.572 | 0.21 | (0.09, 0.31) | 0.0012 |
| All | 0.19 | (0.12, 0.25) | <0.0001 |
a
Tests based on fit of the Cox exponential model adjusted for smoking.