Comparison between visit 1 and visit 2 for HRURV cases
| Visit 1 n=270 | Visit 2 n=270 | P value | |
| Acuity, high* | 15 (5.6) | 12 (4.4) | 0.70 |
| SBP <90 (mm Hg) | 2 (0.7) | 7 (2.6) | 0.07 |
| Heart rate, ≥100 | 72 (26.7) | 186 (69.7) | 0.33 |
| O2 saturation, ≤95% | 20 (7.4) | 21 (7.9) | 0.85 |
| Temperature, ≥38.5°C | 8 (3.0) | 20 (7.5) | 0.03 |
| Respiratory rate, ≥22 | 32 (13.8) | 32 (14.4) | 0.87 |
| Imaging | 134 (49.6) | 109 (40.4) | 0.04 |
| Laboratory tests | 203 (75.2) | 193 (71.5) | 0.38 |
| Drugs | 9 (3.3) | 6 (2.2) | 0.58 |
| Intravenous fluid | 27 (10.0) | 23 (8.5) | 0.62 |
| ECG | 88 (32.6) | 97 (35.9) | 0.21 |
| ED consult | 97 (35.9) | 161 (59.6) | <0.0001 |
| Procedure in ED† | 21 (7.8) | 27 (10.0) | 0.40 |
| LOS (hours) | <0.0001 | ||
| Mean (±SD) | 3.39±2.19 | 4.51±3.17 | |
| Median (IQR) | 2.91 (2.61) | 3.80 (3.37) | |
| Major diagnostic category | <0.0001 | ||
| Digestive system | 67 (24.8) | 44 (16.3) | |
| Musculoskeletal system and connective tissues | 25 (9.3) | 14 (5.2) | |
| Infectious/parasitic diseases | 22 (8.1) | 14 (5.2) | |
| Kidney and urinary tract | 37 (13.7) | 26 (9.6) | |
| Others | 119 (44.1) | 172 (63.7) |
*Reference is the other acuity.
†Includes endotracheal tube, central line, lumbar puncture, chest tube, interventional radiology and endoscopy,
ED, emergency department; HRURV, high-risk unscheduled return visit; LOS, length of stay; SBP, systolic blood pressure.