Our primary outcome was the presence and number of presenting symptoms (Table 1) from illness onset until study enrollment. Symptom groups included gastrointestinal, hydration, lower respiratory, musculoskeletal, neurological, rash or oral changes, systemic, and upper respiratory. Anosmia or ageusia, cough, conjunctivitis, and fever were analyzed independently without being grouped with other symptoms. Secondary outcomes included (1) presence of core COVID-19 symptoms (≥1 of ageusia, anosmia, cough, or fever)19 (link); (2) chest radiography performance and treatment provided; and (3) hospitalization, intensive care unit (ICU) admission, and revisits to any ED or to any health care provider (including the ED) within 14 days of the index ED visit.
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