Figure 2.

RRs and 95% CIs of the association of specific causes of emergency department visits with $T_{\max }$. RRs contrast the 95th percentile of the hospital-specific warm season (May to September) $T_{\max }$ distribution to the hospital-specific minimum morbidity temperature (MMT) over lag 0–7 d among 47 participating children’s hospitals from May to September from 2016 to 2018. The temperature–ED visit association was modeled with a quasi-Poisson regression with distributed-lag nonlinear model for each hospital, controlling for temporal trends, seasonality, relative humidity, federal holidays, and day of the week. RRs are then pooled across the 47 participating hospitals using multivariate random-effect meta-analyses with hospital-specific mean and range of temperatures as the predictors. Note: CI, confidence interval; RR, relative risk; $T_{\max }$, mean daily maximum temperature.