Model* | a_{i} Estimate | Change in (−2lnl) | RR at 1.0 mg/m^{3}.y† | RR at mean exposure‡ | RR at maximum exposure |
---|---|---|---|---|---|

*Based on median (mean) date of first positive film by three (or two) B readers. Stratifying on age (13 levels), calendar time (nine levels), ethnicity (Hispanics v other) and time since first observed (three levels). Cumulative exposures were unlagged and classified in 50 levels together with unexposed level, a_{1} and a_{2} are estimated parameters in two parameter models; †Estimate for cumulative exposure of 1.0 mg/m^{3}.y; ‡Evaluated at mean and maximum cumulative exposures of cases of lung disease other than cancer in full study population. | |||||

Log-linear | 0.2596 | 25.99 | 1.30 | 3.66 | 77.55 |

Log-square root | 1.045 | 32.54 | 2.84 | 10.35 | 72.10 |

Log-quadratic: | |||||

a_{1} | 0.8191 | 35.22 | 2.13 | 13.07 | 0.04 |

a_{2} | −0.0601 | ||||

Power | 1.311 | 33.72 | 2.48 | 10.48 | 43.45 |

Linear relative rate | 4.928 | 35.18 | 5.93 | 25.64 | 83.59 |

Shape: | |||||

a_{1} | 6.095 | 35.27 | 7.10 | 27.37 | 84.64 |

a_{2} | 0.9333 |