Groups | Severe (n) | Mild (n) | Case-severe rate (%) | OR (95%CI) | χ 2 | p |
---|---|---|---|---|---|---|
Reinfection cases | 1.969 (1.458–2.660) | 20.263 | < 0.001a | |||
Primary infection | 128 | 6342 | 1.98 | 1.329 (1.107–1.594) | 9.406 | 0.002b |
Second infection | 65 | 6405 | 1.01 | 0.675 (0.526–0.866) | 9.674 | 0.002c |
Non-reinfection cases | 1507 | 99,700 | 1.49 | 1.000 |