| α0 | Baseline risk |
| i | Index for grid cells |
| k | Age group |
| λi | The local spatial random effect for grid cell i |
| mi | Number of neighbors for grid cell i |
| μik | Poisson rate for grid cell i and age group k |
| Nik | Risk population for grid cell i and age group k |
| τCAR | Spatial precision |
| ξ | Vector of geochemical covariate effects |
| yik | Number of cases for grid cell i and age group k |
| Zi | Vector of geochemical covariates for grid cell i |
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