Table 1.

Basic statistics of 3 cohorts in the Columbia Open Health Data for COVID-19 Research database. The statistics summarized here are based on the data from NewYork-Presbyterian/Columbia University Irving Medical Center as of September 1, 2020.

	COVID-19 cohort	Influenza cohort	General cohort
Time range	March 1, 2020, to August 31, 2020	January 1, 2014, to December 12, 2019	January 1, 2014, to December 12, 2019
Patients, n	4127	3261	175,930
Total inpatient visits, n	4846	3860	314,680
Male patients; inpatient visits, n (%)	2103 (51.0); 2518 (52.0)	1454 (44.6); 1732 (44.9)	67,662 (38.5); 128,908 (41.0)
Female patients; inpatient visits, n (%)	2024 (49.0); 2328 (48.0)	1807 (55.4); 2128 (55.1)	108,268 (61.5); 185,772 (59.0)
Adult patients (aged 18-64 years); inpatient visits, n (%)	2147 (52.0); 2511 (51.8)	1315 (40.3); 1553 (40.2)	104,020 (59.1); 173,843 (55.2)
Senior patients (>65 years); inpatient visits, n (%)	1980 (48.0); 2335 (48.2)	1946 (59.7); 2307 (59.8)	71,910 (40.9); 140,837 (44.8)