Vital sign, laboratory and discharge planning parameters of patients discharged following COVID-19 hospitalization based on subsequent 14-day readmission status
| Patients without 14-day readmission | Patients with 14-day readmission | P value | |
| Total | 818 | 94 | |
| Mean vital signs on discharge day | |||
| Lowest systolic blood pressure (mm Hg) | 127.8 | 130.2 | 0.07 |
| Lowest diastolic blood pressure (mm Hg) | 72.9 | 72.2 | 0.4 |
| Highest heart rate (beats per minute) | 85.2 | 88.7 | 0.04 |
| Highest respiratory rate (breaths per minute) | 19.4 | 20.5 | 0.01 |
| Lowest recorded oxygen saturation (%) | 93 | 95 | 0.14 |
| Highest temperature (°C) | 36.7 | 36.9 | 0.001 |
| Mean laboratory values on discharge day | |||
| Serum sodium (mEq/L) | 138.2 (n=599) | 137.9 (n=72) | 0.49 |
| Serum potassium (mEq/L) | 3.9 (n=599) | 3.9 (n=72) | 0.06 |
| Platelet count (103/µL) | 315 (n=546) | 253 (n=68) | <0.0001 |
| White cell count (109/µL) | 7.9 (n=544) | 8.6 (n=68) | 0.39 |
| Neutrophil percentage | 64.2 (n=387) | 71.7 (n=44) | 0.009 |
| Lymphocyte percentage | 24.1 (n=387) | 16.7 (n=44) | 0.004 |
| Mean last measured values during hospitalization | |||
| D-dimer (ng/mL) | 1276 (n=730) | 1492 (n=66) | 0.22 |
| Procalcitonin (ng/mL) | 1.1 (n=742) | 1.13 (n=72) | 0.06 |
| Discharge planning and disposition characteristics, n (%) | |||
| Discharge instructions complete | 766 (88.4) | 31 (32.9) | <0.0001 |
| COVID-19-specific discharge instructions provided | 570 (65.8) | 34 (36.2) | <0.0001 |
| Follow-up appointment made | 568 (58.3) | 30 (31.9) | 0.002 |
| Home oxygen arranged | 128 (14.8) | 3 (3.2) | 0.0001 |
| Discharged to facility | 142 (14.5) | 46 (50) | <0.0001 |