COVID-19 and non-COVID-19 cohorts, unmatched and matched datasets
| Characteristic/outcome | Pre-matching | Post-matching | ||||
| Non-COVID-19 | COVID-19 | P value | Non-COVID-19 | COVID-19 | P value | |
| No of patients | 206 | 93 | 91 | 91 | ||
| Age, median (IQR), years | 58.2 (50–65.7) | 59 (54–67) | 0.11 | 59.3 (52.5–66.7) | 60 (54–67) | 0.74 |
| Gender, male (%) | 112 (54.6) | 61 (65.6) | 0.08 | 56 (61.5) | 61 (67) | 0.44 |
| Follow-up time, days, median, (IQR) | 144 (96–181) | 113 (84–156) | 0.05 | 118 (86–166) | 142 (94–180) | 0.21 |
| Documented obesity on admission, no (%) | 50 (24.4) | 30 (32.3) | 0.16 | 24 (26.4) | 29 (31.9) | 0.41 |
| Prescence of 2 of multimorbidity (two or more comorbidities) (%) | 64 (31.2) | 47 (51.1) | <0.01 | 32 (35.2) | 45 (50) | 0.12 |
| Mental Health problems pre-ICU, no (%) | 68 (33.2) | 12 (12.9) | <0.01 | 15 (16.5) | 11 (12.1) | 0.40 |
| Critical Care Length of stay, median (IQR) days | 11.6 (5–25.3) | 11.1 (5–25.3) | 0.67 | 12.8 (7–23.7) | 11.1 (5–25.8) | 0.21 |
| APACHE II, median (IQR) | 20 (15–25) | 15 (10–20) | <0.01 | 17 (13–20.1) | 16 (12–19) | 0.08 |
| Socioeconomic status (SIMD category) | 0.13 | 0.71 | ||||
| 1 (most deprived) | 83 (40.5) | 29 (31.5) | 33 (36.2) | 28 (31.1) | ||
| 2 | 50 (24.4) | 19 (20.7) | 16 (17.6) | 19 (21.1) | ||
| 3 | 31 (15.1) | 20 (21.7) | 21 (23.1) | 20 (22.2) | ||
| 4 | 22 (10.7) | 8 (8.7) | 10 (11) | 7 (7.8) | ||
| 5 | 19 (9.3) | 16 (17.4) | 11 (12.1) | 16 (17.8) | ||
APACHE II, Acute Physiology and Chronic Health Evaluation II ; SIMD, Scottish Index of Multiple Deprivation.