Table:
Characteristics of patients in training and testing datasets
| Training dataset (University of Michigan) | Internal testing dataset (University of Michigan) | External testing dataset (University of Pennsylvania) | |
|---|---|---|---|
| Patients | 1778 | 455 | 431 |
| Chest radiographs | 8072 | 1560 | 958 |
| Radiographs with ARDS* | 2665 (33%) | 438 (28%) | 445 (46%) |
| Age, years | 62 (51–71) | 63 (53–72) | 61 (52–69) |
| Sex | |||
| Male | 1036 (58%) | 266 (58%) | 251 (58%) |
| Female | 742 (42%) | 189 (42%) | 180 (42%) |
| Race | |||
| White | 1515 (85%) | 377 (83%) | 273 (63%) |
| Black | 164 (9%) | 49 (11%) | 129 (30%) |
| Other or unknown† | 99 (6%) | 29 (6%) | 29 (7%) |
| ARDS risk factor | |||
| Pneumonia | 591 (33%) | 126 (28%) | 101 (23%) |
| Aspiration | 215 (12%) | 39 (9%) | NA |
| Non-pulmonary sepsis | 394 (22%) | 114 (25%) | 330 (77%) |
| Trauma | 110 (6%) | 28 (6%) | NA |
| APACHE score | 67 (52–85) | 68 (55–86) | 98 (72–129) |
| 30-day mortality | 420 (24%) | 119 (26%) | 188 (44%) |
Data are n, n (%), or median (IQR). ARDS=acute respiratory distress syndrome. NA=not applicable. APACHE=Acute Physiology and Chronic Health Evaluation.
*
Based on physician reviews.
†
Includes Asian, American Indian, Native Alaskan, Native Hawaiian, or other Pacific Islander.