Table 4.
Validation cohort characteristics and trajectories; emergency department attendances 1 September – 23 October 2020
| Demographics | All patients, n=134 | COVID-19 positive, n=47 | COVID-19 negative or swab not done, n=87 |
|---|---|---|---|
| Age, median (IQR) | 41 (28–56) | 47 (29–60) | 37 (27–53) |
| Female, n (%) | 68 (50.7) | 23 (48.9) | 45 (51.7) |
| Characteristics at ED presentation | |||
| Oxygen saturation, %, median (IQR) | 97.5 (96–99) | 96 (95.5–98) | 96 (96–98) |
| C-reactive protein, mg/L, median (IQR) | 8.4 (1.3–25.4) | 11 (3.7–24.7) | 6.9 (0.6–25.6) |
| Cohort trajectories | |||
| Number of telephone encounters, median (range) | 1 (1–8) | 2 (1–8) | 1 (1–5) |
| Total reattendances, n (%) | 12 (9.0) | 7 (14.6) | 5 (5.7) |
| Planned reattendances, n (%) | 5 (3.7) | 3 (6.2) | 2 (2.3) |
| Planned reattendances leading to admissions, n (%) | 2 (1.5) | 2 (1.3) | – |
| Unplanned reattendances, n (%) | 7 (5.2)a | 4 (8.3)b | 3 (3.4) |
| Unplanned reattendances leading to admissions, n (%) | 3 (2.2) | 3 (6.2) | – |
Missing data: oxygen saturation (2) and C-reactive protein (12).
a of which five had been uncontactable by the telephone clinic;
b of which two had been uncontactable; ED = emergency department; IQR = interquartile range.