Variables selected by the Cox regression model
| p value | RR | 95% CI | |
|---|---|---|---|
| RR, risk ratio. | |||
| Global model (with interaction between age and vaccine) | |||
| Vaccinated (0 = no/1 = yes) | 0.01 | 0.20 | 0.06 to 0.68 |
| Age (0 = <65/1 = ⩾65 years) | 0.23 | 0.66 | 0.33 to 1.31 |
| Severe airflow obstruction (0 = no/1 = yes) | 0.01 | 2.03 | 1.21 to 3.41 |
| Age × vaccinated | 0.01 | 5.82 | 1.45 to 23.34 |
| Model for age <65 years | |||
| Vaccinated (0 = no/1 = yes) | 0.01 | 0.19 | 0.06 to 0.66 |
| Severe airflow obstruction | 0.04 | 2.62 | 1.04 to 6.55 |
| Model for age ⩾65 years | |||
| Vaccinated (0 = no/1 = yes) | 0.66 | 1.53 | 0.61 to 2.17 |
| Severe airflow obstruction | 0.07 | 1.81 | 0.96 to 3.39 |