Table 4. Trend testa for significantly increased lung cancer risk with unlagged cumulative exposure.
| Cumulative exposures retained (mg/m3-years) | β (mg/m3-years)−1 | P-value | |
|---|---|---|---|
| MLE | 95% CI | ||
| ⩽0.14 | 4.9 | (−7.6, 16.5) | 0.42 |
| ⩽0.35 | –1.4 | (−6, 2.7) | 0.51 |
| ⩽0.47 | 0.43 | (−2.3, 3.1) | 0.75 |
| ⩽1.12 | 0.05 | (−1.2, 1.2) | 0.93 |
| ⩽1.41 | 0.89 | (0.06, 1.7) | 0.04 |
| ⩽2.14 | 0.48 | (−0.004, 0.93) | 0.05 |
| ⩽4.15 | 0.22 | (−0.02, 0.45) | 0.07 |
| ⩽6.27 | 0.29 | (0.13, 0.44) | 0.0004 |
| All | 0.19 | (0.12, 0.25) | <0.0001 |
a
Tests based on fit of the Cox exponential model adjusted for smoking.