Table 2.
Logistic regression analysis of candidate predictors for requiring supplemental oxygen.
| Univariate model | Multivariate model | |||
|---|---|---|---|---|
| OR (95% CI) | p value | Adjusted OR (95% CI) | p value | |
| Age, years | ||||
| < 65 | 1 (ref) | – | 1 (ref) | – |
| ≧ 65 | 9.81 (3.90–25.87) | < 0.001 | 2.52 (0.91–7.02) | 0.076 |
| Sex | ||||
| Female | 1 (ref) | – | – | – |
| Male | 1.77 (0.76–4.41) | 0.186 | – | – |
| Charlson Comorbidity Index | ||||
| 0 | 1 (ref) | – | 1 (ref) | – |
| ≧ 1 | 21.40 (7.51–76.01) | < 0.001 | 14.11 (4.53–43.99) | < 0.001 |
| Temporal trend | ||||
| March to October 2020 | 1 [ref] | – | – | – |
| November 2020 to January 2021 | 1.69 (0.76–3.73) | 0.180 | – | – |
| Infection | ||||
| Clade 20B-nonT | 1 (ref) | – | 1 (ref) | – |
| Clade 20B-T [B.1.1.284] | 0.38 (0.16–0.84) | 0.011 | 0.35 (0.14–0.88) | 0.026 |
OR, odds ratio; CI, cofidence interval.