“…Using the NACCHO database of 2,864 LHDs, we applied a probabilityproportional-to-size sampling design to generate a stratified random sample of 750 LHDs that reflects the national distribution of large (.250,000), medium (25,000-250,000), and small (,25,000) populations. 47 Survey data were collected from disaster preparedness coordinators at LHDs using an online data collection system. All respondents filled out UCLA Institutional Review Board informed consent forms.…”