Characteristics of admissions to hospital for COVID-19 and influenza
| Variable | No. (%) of admissions* | SD† | |
|---|---|---|---|
| COVID-19 n = 1027 | Influenza n = 783 | ||
| Unique patients | 972 (94.6) | 763 (97.4) | N/A |
| Age, yr, median (IQR) | 65 (53–79) | 68 (55–80) | 0.07 |
| Age group, yr | 0.09 | ||
| < 50 | 218 (21.2) | 141 (18.0) | |
| 50–75 | 480 (46.7) | 390 (49.8) | |
| > 75 | 329 (32.0) | 252 (32.2) | |
| Sex, male | 607 (59.1) | 398 (50.8) | 0.17 |
| Charlson score | 0.31 | ||
| 0 | 556 (54.1) | 304 (38.8) | |
| 1 | 183 (17.8) | 175 (22.3) | |
| ≥ 2 | 288 (28.0) | 304 (38.8) | |
| Neighbourhood income quintile | 0.15 | ||
| 1 (lowest) | 351 (34.2) | 248 (31.7) | |
| 2 | 177 (17.2) | 139 (17.8) | |
| 3 | 153 (14.9) | 127 (16.2) | |
| 4 | 163 (15.9) | 142 (18.1) | |
| 5 (highest) | 112 (10.9) | 95 (12.1) | |
| Missing | 71 (6.9) | 32 (4.1) | |
| Neighbourhood visible minority quintile | 0.19 | ||
| 1 (lowest) | 100 (9.7) | 100 (12.8) | |
| 2 | 196 (19.1) | 167 (21.3) | |
| 3 | 264 (25.7) | 171 (21.8) | |
| 4 | 181 (17.6) | 166 (21.2) | |
| 5 (highest) | 212 (20.6) | 138 (17.6) | |
| Missing | 74 (7.2) | 41 (5.2) | |
| Long-term care resident | 120 (11.7) | 35 (4.5) | 0.27 |
| Transfer from acute care hospital | 90 (8.8) | 24 (3.1) | 0.24 |
| Comorbidities‡ | |||
| Hypertension | 356 (34.7) | 252 (32.2) | 0.05 |
| Diabetes mellitus | 284 (27.7) | 229 (29.2) | 0.04 |
| Renal failure | 212 (20.6) | 169 (21.6) | 0.02 |
| Neurocognitive disorders | 174 (16.9) | 105 (13.4) | 0.10 |
| Coronary heart disease | 63 (6.1) | 63 (8.0) | 0.08 |
| Heart failure | 62 (6.0) | 98 (12.5) | 0.23 |
| COPD | 55 (5.4) | 96 (12.3) | 0.25 |
Note: COPD = chronic obstructive pulmonary disease, COVID-19 = coronavirus disease 2019, IQR = interquartile range, N/A = not applicable, SD = standardized difference.
↵* Unless indicated otherwise.
↵† SD > 0.1 reflects imbalance between groups. (40)
↵‡ Comorbidities were categorized from ICD-10-CA discharge diagnoses using the Clinical Classification Software Refined tool. (26)