TABLE 1.
Cohort Demographics
| Dataset | Michigan Medicine | Hurley Medical Center | p |
|---|---|---|---|
| Encounters, n | 44,202 | 11,083 | NA |
| Patients, n | 30,374 | 8,010 | NA |
| Date range (date of admission) | January 1, 2019, to November 23, 2020 | January 1, 2015, to November 23, 2020 | NA |
| Age (yr), median (interquartile range) | 61.5 (47.6–71.8) | 58.2 (44.2–70.3) | < 0.001 |
| Race, n (%) | |||
| Asian | 855 (2.0) | 18 (0.2) | < 0.001 |
| Black | 5,575 (12.6) | 5,044 (45.5) | < 0.001 |
| White | 35,480 (80.3) | 5,641 (50.9) | < 0.001 |
| Other | 2,292 (5.2) | 380 (3.4) | < 0.001 |
| Ethnicity, n (%) | |||
| Hispanic/Latino | 1,196 (2.7) | 258 (2.3) | 0.026 |
| Non-Hispanic/Latino | 42,210 (95.5) | 10,776 (97.2) | < 0.001 |
| Other | 652 (1.5) | 49 (0.4) | < 0.001 |
| Female sex, n (%) | 21,592 (48.8) | 6,000 (54.1) | < 0.001 |
| Event rate, n (%) | 1,998 (4.5) | 278 (2.5) | < 0.001 |
| Death | 360 (0.8) | 69 (0.6) | 0.040 |
| ICU transfer | 1,610 (3.6) | 200 (1.8) | < 0.001 |
| Mechanical ventilation | 28 (0.1) | 9 (0.1) | 0.516 |
NA = not available.
Cohort size, sex, racial and ethnic makeup, and target prevalence. Statistics are calculated per-encounter. For the event rate percentages, in the case that multiple outcome criteria were met, only the first event was counted. p values are calculated across the two datasets using a Mann-Whitney U test for continuous variables (age) and a χ2 test for categorical variables.