Table 1.
Descriptive statistics for CRWD and OPTUM extracted cohorts
| CRWD (n=247 960) | OPTUM (n=36 140) | ||
|---|---|---|---|
| Demographics | |||
| Median age at index visit, years | 57 (36–72) | 60 (44–72) | |
| Sex* | |||
| Female | 130 540 (52·6%) | 18 237 (50·5%) | |
| Male | 116 653 (47·0%) | 17 885 (49·5%) | |
| Race and ethnicity* | |||
| White | 168 606 (68·0%) | 19 704 (54·5%) | |
| African American | 36 762 (14·8%) | 7 836 (21·7%) | |
| Asian | 5494 (2·2%) | 930 (2·6%) | |
| American Indian or Alaska Native | 4285 (1·7%) | NA† | |
| Hispanic | 72 068 (29·1%) | 5782 (16·0%) | |
| Comorbidities | |||
| Hypertension | 114 387 (46·1%) | 22 035 (61·0%) | |
| Diabetes | 64 023 (25·8%) | 12 942 (35·8%) | |
| Congestive heart failure | 36 040 (14·5%) | 6568 (18·2%) | |
| Chronic kidney disease | 34 789 (14·0%) | 7517 (20·8%) | |
| Cancer | 19 145 (7·7%) | 5094 (14·1%) | |
| Outcomes | |||
| In-hospital mortality | 13 607 (5·5%) | 4831 (13·4%) | |
| Median time to event, days | 8 (4–16) | 5 (3–10) | |
| Mechanical ventilation | 33 505 (13·5%) | 9582 (26·5%) | |
| Intubated on first day (index date) | 17 811 (7·2%) | 4466 (12·4%) | |
| Median time to event, days | 2 (1–5) | 3 (2–7) | |
| Prolonged hospital stay | 46 421 (18·7%) | 12 457 (34·5%) | |
| Median length of stay, days | 3 (1–6) | 5 (3–10) | |
| Total number of unique features | 123 642 | 67 128 | |
| Number of health-care systems | 87 | 197 | |
Data are median (IQR) or n (%). CRWD=Cerner Real-World COVID-19 Q3 Dataset. NA=not applicable. OPTUM=Optum deidentified COVID-19 electronic health record dataset.
*
Data do not add up to N totals as some patients fell into the other or unknown category.
†
This race did not appear in OPTUM.