Exposure categorisation | Score assignment | ||
---|---|---|---|

Category midpoint | Category mean | Cell specific mean | |

Bias, λ | Bias, λ | Bias, λ | |

Coefficient of bias, . Estimates were derived after 100 repetitions of each simulation. | |||

5 categories | 0.42 | 1.16 | 1.24 |

Based on quintiles of the cumulative exposure distribution | |||

10 categories | 0.50 | 1.04 | 1.12 |

Based on deciles of the cumulative exposure distribution | |||

5 categories | 0.67 | 0.98 | 1.04 |

Based on quintiles of the cumulative exposure distribution among cases | |||

10 categories | 0.78 | 0.99 | 1.02 |

Based on deciles of the cumulative exposure distribution among cases |