OR (95% CI) | p Value | |
Age ⩾70 | 0.70 (0.32 to 1.54) | 0.376 |
Current tobacco smoking | 2.11 (1.02 to 4.34) | 0.044 |
Chronic corticosteroid treatment | 4.45 (1.75 to 11.32) | 0.002 |
Prior influenza vaccine (season) | 0.55 (0.26 to 1.21) | 0.138 |
Serotype 3 | 2.24 (1.12 to 4.475) | 0.022 |
Serotype 1 | 0.26 (0.03 to 1.97) | 0.190 |
Bacteraemia | 1.50 (0.75 to 2.99) | 0.251 |