Demographics, medical history and vital signs of admitted patients
| Spring (n=4495) | Summer (n=264) | Fall (n=377) | Winter (n=2254) | |
| 30-day hospital outcome, n (%) | ||||
| Still admitted | 194 (4.3) | 6 (2.3) | 15 (4.0) | 103 (4.6) |
| Discharged alive | 3177 (70.7) | 229 (86.7) | 336 (89.1) | 1893 (84.0) |
| Died in the hospital | 1124 (25.0) | 29 (11.0) | 26 (6.9) | 258 (11.4) |
| Demographics | ||||
| Age (IQR), years | 66 (55–77) | 66 (50–76) | 63 (50–73) | 67 (56–77) |
| Male sex, n (%) | 2377 (52.9) | 138 (52.3) | 198 (52.5) | 1122 (49.8) |
| Black race and/or Hispanic ethnicity, n (%) | 3345 (74.4) | 219 (83.0) | 286 (75.9) | 1635 (74.2) |
| Body mass index (IQR), kg/m2 | 28.4 (24.6–33) | 27.6 (22.5–32.7) | 28.6 (25–34.1) | 28.2 (24.4–33.1) |
| Hospital bed saturation, % (IQR) | 97.4 (86.5–107.6) | 81.7 (76.3–85.8) | 87.6 (83.2–90.2) | 95.3 (91.9–101.8) |
| Medical history, n (%) | ||||
| Hypertension | 3370 (75) | 197 (74.6) | 254 (67.4) | 1713 (76) |
| Sleep apnoea | 521 (11.6) | 28 (10.6) | 47 (12.5) | 270 (12) |
| Hyperlipidaemia | 2609 (58) | 153 (58) | 199 (52.8) | 1380 (61.2) |
| Atrial fibrillation | 449 (10) | 30 (11.4) | 35 (9.3) | 267 (11.8) |
| Chronic kidney disease | 1406 (31.3) | 70 (26.5) | 85 (22.5) | 620 (27.5) |
| Heart failure | 980 (21.8) | 72 (27.3) | 66 (17.5) | 519 (23) |
| Coronary artery disease | 1316 (29.3) | 95 (36) | 108 (28.6) | 721 (32) |
| Asthma/COPD | 1371 (30.5) | 84 (31.8) | 98 (26) | 753 (33.4) |
| Diabetes mellitus | 2522 (56.1) | 148 (56.1) | 187 (49.6) | 1244 (55.2) |
| Vitals at presentation | ||||
| Temperature (IQR), °C | 37.2 (36.8–37.8) | 36.9 (36.6–37.2) | 37.1 (36.7–37.7) | 37.1 (36.7–37.7) |
| SBP (IQR), mm Hg | 131 (114–148) | 132 (117–149) | 131 (117–147) | 132 (117–148) |
| DBP (IQR), mm Hg | 75 (65–84) | 77 (67–87) | 74 (68–84) | 75 (67–84) |
| HR (IQR), beats per minute | 98 (85–112) | 92.5 (76.3–105) | 94 (80–107) | 95 (82–107) |
| Oxygen saturation (IQR), % | 95 (91–98) | 98 (96–99) | 96 (94–98) | 96 (92–98) |
| Respiratory rate (IQR), breaths per minute | 20 (18–22) | 18 (17–20) | 18 (18–20) | 19 (18–22) |
COPD, chronic obstructive pulmonary disease; DBP, diastolic blood pressure; HR, heart rate; SBP, systolic blood pressure.