| July 2019-February 2020 | March 2020–September 4, 2021 | |||
---|---|---|---|---|---|
 | Pre-pandemic period | Pandemic period | |||
Characteristics |  | SARS-CoV-2 +  | SARS-CoV-2 − | SARS-CoV-2 not tested | Total |
 | 20,113 | 1638 | 27,476 | 10,590 | 39,704 |
Unadjusted BSI rate per 1000 admissions | 11.240 | 9.613c | 15.818c | 6.864c | 11.508a |
Mean age ± SD, (IQR; median) | 65.1 ± 16.7 (55–78; 67) | 66.2 ± 16.2 (56–79; 68)a | 65.2 ± 16.3 (55–77; 67) | 64.6 ± 16.6 (55–77; 67)a | 65.2 ± 16.4 (55–77; 67) |
Males, n (%) | 10,467 (52.0) | 843 (51.5) | 14,751 (53.7)b | 5560 (52.5) | 21,154 (53.3%)a |
Prior 30-day admission, (%) | 13.2% (2655) | 16.7% (274)c | 14.4% (3945)c | 14.9% (1581)c | 14.6% (5800)c |
Prior 90-day admission (%) | 22.7% (4572) | 27.2% (445)c | 26.9% (7393)c | 27.3% (2889)c | 27.0% (10,727)c |
 ≥1 Underlying conditionsd (%) | 86.3% (17,356) | 94.6% (1550)c | 90.7% (24,932)c | 83.9% (8889)c | 89.1% (35,371)c |
LOS (days): avg ± SD (IQR; median) | 9.1 ± 8.3 (4–11; 7) | 12.2 ± 11.8 (5–15; 9)c | 9.2 ± 8.6 (4–11; 7) | 8.3 ± 7.8 (4–10; 6)c | 9.6 ± 8.6 (4–11; 7) |
% Ventilatede (%) | 4.7% (954) | 10.7% (175)c | 5.4% (1490)c | 4.0% (424)a | 5.3% (2089)b |
ICU admission (%) | 32.8% (6591) | 36.6% (600)b | 29.6% (8138)c | 26.5% (2838)c | 29.2% (11,576)c |
Overall LOS (days): avg ± SD (IQR; median) | 12.1 ± 10.6 (6–15; 9) | 15.5 ± 14.9 (6–20; 12)c | 12.5 ± 11.7 (6–15, 9) | 11.3 ± 10.7 (5–14; 8)c | 12.3 ± 11.7 (5–15; 9) |
ICU LOS (days): avg ± SD (IQR; median) | 4.7 ± 5.3 (2–6; 3) | 6.5 ± 7.4 (2–8; 4)c | 5.0 ± 6.8 (2–6; 3)a | 4.6 ± 5.5 (1–6; 3)c | 5 ± 6.6 (2–6; 3)b |
Hospital mortality (%) | NA | 20.7% (237/1,146) | 7.0% (1324/18,843) | NA | 7.8% (1567/20,064) |