Table 3. Factors associated with incidence of complications in study of COVID-19 and influenza patients, South Korea*.
| Variable | Adjusted odds ratio (95% CI)† |
|
|---|---|---|
| COVID-19, n = 21,615 | Influenza, n = 2,380,696 | |
| Female (referent: male) |
1.03 (0.96–1.11) |
1.04 (1.04–1.05) |
| Age, y (referent: 20–44 y) | ||
| 0–19 | 0.69 (0.59–0.80) | 0.94 (0.94–0.95) |
| 45–64 | 0.81 (0.74–0.88) | 0.97 (0.96–0.98) |
| 65–74 | 0.86 (0.76–0.96) | 1.07 (1.05–1.08) |
| >75 |
0.86 (0.75–0.99) |
1.26 (1.24–1.28) |
| National Health Insurance Service (referent: Medical Aid) |
0.85 (0.75–0.97) |
0.94 (0.92–0.96) |
| Region (referent: other areas) | ||
| Seoul metropolitan area | 0.90 (0.82–0.99) | 1.03 (1.02–1.03) |
| Daegu and Gyeongsangbuk province |
1.44 (1.31–1.59) |
1.02 (1.01–1.03) |
| Charlson Comorbidity Index score (referent: 0) | ||
| 1–2 | 1.02 (0.94–1.11) | 1.08 (1.08–1.09) |
| >3 |
1.01 (0.88–1.16) |
1.12 (1.10–1.13) |
| Severity (referent ambulatory state) | ||
| Hospitalized mild disease | 1.19 (1.09–1.30) | 1.22 (1.21–1.23) |
| Hospitalized severe disease | 1.11 (0.91–1.34) | 1.36 (1.29–1.43) |
*COVID-19, coronavirus disease. †Multivariable logistic regression includes sex, age, type of insurance, region, and Charlson Comorbidity Index.