Outcomes and hospital events of the study population
| RSV n=152, n (%) | Influenza n=573, n (%) | P value | |
| Hospitalised | 128 (84.2) | 378 (66.0) | <0.001 |
| Discharged from ER | 24 (15.8) | 195 (34.0) | |
| Hospital treatment (days) | |||
| Range | 1–40 | 1–66 | |
| Mean (SD) | 4.5 (4.5) | 4.1 (5.7) | 0.425 |
| Median (IQR) | 5 (3–6) | 5 (3–7) | |
| Need of supplemental oxygen | 77 (50.7) | 179 (31.2) | <0.001 |
| Non-invasive ventilation | 17 (11.2) | 50 (8.7) | 0.352 |
| ICU admission | 6 (3.9) | 23 (4.0) | 0.970 |
| ICU treatment duration (days) | |||
| Range | 1–3 | 1–21 | |
| Mean (SD) | 2.5 (0.8) | 5.3 (4.3) | 0.016 |
| Median (IQR) | 3 (2–3) | 4 (3–6) | |
| Invasive ventilation | 2 (1.3) | 4 (0.7) | 0.383* |
| Pneumonia | 57 (37.5) | 133 (23.2) | <0.001 |
| Positive blood cultures | 7 (4.6) | 10 (1.7) | 0.045* |
| Antibiotic used | 102 (67.1) | 272 (47.3) | <0.001 |
| Hospital all-cause mortality | 5 (3.3) | 15 (2.6) | 0.413 |
| All-cause mortality during hospitalisation and 30 days after discharge | 13 (8.6) | 20 (3.5) | 0.010 |
| Time from hospitalisation to death (days) | |||
| Range | 3–40 | 1–51 | |
| Mean (SD) | 13.4 (15.3) | 8.1 (12.4) | 0.266 |
| Median (IQR) | 6 (4–27) | 4 (2–9) | |
Continuous variables (hospital treatment duration, ICU treatment duration, time from hospitalisation to death) are presented as mean and SD and median and IQR (25th–75th percentile); categorical variables are presented as number (n) and per cent (%). P values were calculated with Mann-Whitney U test for continuous variables and with χ2 test and Fisher’s exact test for categorical variables.
*Calculated with Fisher’s exact test.
ER, emergency room; ICU, intensive care unit; RSV, respiratory syncytial virus.