a positive trendP < .01
Impact of Population-Level Incidence Rate of Cases During the Study Period and Cumulative Incidence of Cases Before the Study Period on Household SAR Despite large heterogeneity in SAR estimates, we still observed a positive trend between the SAR and the incidence rate of cases (correlation, 0.37; 95% CI, 0.24–0.49; P < .01) or deaths (correlation, 0.34; 95% CI, 0.20–0.47; P < .01) ( Figure 2 ).