Table 3. Primary and secondary outcomes stratified by virus type and variant.
| Outcomes | Overall | Influenza | Wild-type/Delta | Omicron |
|---|---|---|---|---|
| N = 35,806 | N = 4,916 | N = 16,654 | N = 14,236 | |
| Pneumonia | 37.0 (13,266) | 28.7 (1,412) | 55.5 (9,235) | 18.4 (2,619) |
| Ventilation | 10.0 (3,567) | 7.6 (375) | 14.9 (2,489) | 4.9 (703) |
| In-hospital mortality | 11.7 (4,214) | 4.7 (231) | 16.8 (2,791) | 8.4 (1,192) |
| Length of stay (days) | ||||
| • Median [Q1, Q3] | 7 [3, 16] | 6 [3, 11] | 8 [4, 17] | 7 [3, 15] |
| • Mean (SD) | 13 (19) | 11 (17) | 15 (22) | 12 (17) |
Metric data are shown as means (standard deviations) and as medians [25th and 75th percentiles]. Categorical data are presented as frequencies and absolute numbers. The analyses were stratified by virus type and virus variant.