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 | 0.50 | 1.24 | 1.21 |
Based on quintiles of the cumulative exposure distribution | |||
10 categories | 0.58 | 1.11 | 1.13 |
Based on deciles of the cumulative exposure distribution | |||
5 categories | 0.73 | 1.15 | 1.14 |
Based on quintiles of the cumulative exposure distribution among cases | |||
10 categories | 0.84 | 1.08 | 1.08 |
Based on deciles of the cumulative exposure distribution among cases |