HRs for GP-diagnosed COVID-19, adjusted for covariables, total group (n=223 580)
| Covariable | GP-diagnosed COVID-19 HR | 95% CI |
| Influenza vaccination in 2019 (yes vs no) | 1.15 | 1.08 to 1.22 |
| Age group, relative to group 0–59 years | ||
| 60–74 years | 0.68 | 0.63 to 0.73 |
| 75+ years | 0.67 | 0.61 to 0.73 |
| Sex (female vs male) | 1.08 | 1.02 to 1.15 |
| Cardiovascular disease (yes vs no) | 1.11 | 1.03 to 1.20 |
| Pulmonary disease (yes vs no) | 1.15 | 1.06 to 1.25 |
| Diabetes mellitus (yes vs no) | 1.30 | 1.21 to 1.40 |
| Chronic renal insufficiency (yes vs no) | 1.19 | 1.04 to 1.37 |
| Number of acute respiratory infection consultations in 2019, relative to 0 | ||
| 1 | 1.28 | 1.15 to 1.43 |
| ≥2 | 1.50 | 1.33 to 1.69 |
GP, general practitioner.