Patient demographics for emergency department (ED) encounters after versus before the COVID-19 pandemic, UMHS 2015–2020
| Total n=10 753 | COVID-19 in Michigan | OR (95% CI)* | ||
| Days before 1 October 2015 to 9 March 2020 | Days after 10 March 2020 to 31 October 2020 | |||
| n=9405 | n=1348 | |||
| Gender (%) | ||||
| Female | 6837 (63.6) | 6022 (64.0) | 815 (60.5) | Reference |
| Male | 3916 (36.4) | 3383 (36.0) | 533 (39.5) | 1.16 (1.04 to 1.31) |
| Age, mean (SD) | 27.1 (14.8) | 27.0 (14.9) | 27.9 (14.3) | 1.00 (1.00 to 1.01) |
| Age group (%) | ||||
| Younger than 18 | 4590 (42.7) | 4107 (43.7) | 483 (35.8) | Reference |
| 18–65 | 5996 (55.8) | 5145 (54.7) | 851 (63.1) | 1.41 (1.25 to 1.58) |
| Older than 65 | 166 (1.5) | 152 (1.6) | 14 (1.0) | 0.79 (0.43 to 1.33) |
| Race (%) | ||||
| Caucasian | 8471 (79.0) | 7383 (78.7) | 1088 (81.3) | Reference |
| African American | 1337 (12.5) | 1185 (12.6) | 152 (11.4) | 0.87 (0.72 to 1.04) |
| Other | 537 (5.0) | 471 (5.0) | 66 (4.9) | 0.95 (0.72 to 1.23) |
| Asian | 374 (3.5) | 342 (3.7) | 32 (2.4) | 0.64 (0.43 to 0.91) |
| Marital status (%) | ||||
| Unmarried | 8305 (90.8) | 7282 (90.3) | 1023 (94.4) | Reference |
| Married | 839 (9.2) | 778 (9.7) | 61 (5.6) | 0.56 (0.42 to 0.73) |
| ED encounter frequency (%) | ||||
| One encounter | 2497 (23.2) | 2201 (23.4) | 296 (22.0) | Reference |
| Two encounters | 3695 (34.4) | 3269 (34.8) | 426 (31.6) | 0.97 (0.83 to 1.14) |
| Three or more encounters | 4561 (42.4) | 3935 (41.8) | 626 (46.4) | 1.18 (1.02 to 1.37) |
*Bivariate logistic regression tests change in patient demographic proportions after versus before the COVID-19 pandemic in Michigan.
UMHS, University of Michigan Health System.