Baseline Characteristics
Baseline characteristics of the 2020 cohort and the 2019 cohort are displayed in Table 1. Patients in the 2020 cohort were more likely to have prior history of stroke/transient ischemic attack (TIA) in comparison to the 2019 cohort (14% and 6%, p=0.03), and more often presented with persistent atrial arrhythmia (50% and 32% respectively, p<0.01). On the first day of the study period (4/15/20), there were 9,282 COVID-19 tests performed in New York City, of which 4,368 (38%) were positive tests10. On the last day of the study period (6/15/20) there were 25,754 COVID-19 tests performed in New York City, of which 639 (1.7%) were positive tests10.