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 | Â | Â |
 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) |