Fig. 4.

Relative risks on a weekly and a daily basis according to the structured and unstructured temporal random effects estimated through Models 3 (a) and 4 (b). The relative risk corresponding to the structured component is computed as either $exp({\gamma }_{w(t)})$ or $exp({\gamma }_t)$, whereas the one corresponding to the unstructured component is computed as either $exp({\varphi }_{w(t)})$ or $exp({\varphi }_t)$