Table 1 Predictor variables and outcomes in 135,470 adult emergency department visits
From: Emergency department triage prediction of clinical outcomes using machine learning models
| Variable | n = 135,470 | |
|---|---|---|
| Age (year), median (IQR) | 46 | (29–60) |
| Female sex | 58,450 | (43.1) |
| Mode of arrival | ||
| Ambulance | 26,820 | (19.8) |
| Emergency Severity Index | ||
| 1 (immediate) | 2628 | (1.9) |
| 2 (emergent) | 16,908 | (12.5) |
| 3 (urgent) | 65,917 | (48.7) |
| 4 (semi-urgent) | 41,007 | (30.3) |
| 5 (non-urgent) | 9010 | (6.7) |
| Vital signs | ||
| Temperature (F), median (IQR) | 98.1 | (97.6–98.5) |
| Pulse rate (bpm), median (IQR) | 85 | (74–97) |
| Systolic blood pressure (mmHg), standard deviation (SD) | 136 | (23.2) |
| Diastolic blood pressure (mmHg), standard deviation (SD) | 79 | (14.5) |
| Respiratory rate (per min), median (IQR) | 18 | (16–20) |
| Oxygen saturation (%), median (IQR) | 98 | (97–99) |
| Common chief complaints | ||
| Musculoskeletal-related complaints | 21,499 | (15.9) |
| Gastrointestinal-related complaints | 20,947 | (15.5) |
| General complaints (e.g., fever) | 20,581 | (15.2) |
| Injuries | 16,731 | (12.4) |
| Respiratory-related complaints | 13,539 | (10.0) |
| Neurological-related complaints | 9828 | (7.3) |
| Urological-related complaints | 6869 | (5.1) |
| Psychiatry-related complaints | 4379 | (3.2) |
| Treatment-related complaints (e.g., side effects) | 3368 | (2.5) |
| Eye and ear-related complaints | 2952 | (2.2) |
| Skin-related complaints | 2902 | (2.1) |
| Intoxication | 1980 | (1.5) |
| Elixhauser comorbidity measures (≥ 1) | 18,249 | (13.5) |
| Clinical outcomes | ||
| Critical care outcome* | 2782 | (2.1) |
| Hospitalization outcome† | 22,010 | (16.2) |