Table 5.
RI | 95% CI | p | |
---|---|---|---|
Exposure risk period (with date of vaccination as day 0) | |||
Days 0 to 6 | 2.42 | 2.30–2.55 | <0.001 |
Time from start of influenza season (reference: Days 0 to 29) | |||
Days 30 to 59 | 1.00 | 0.99–1.02 | 0.557 |
Days 60 to 89 | 1.05 | 1.04–1.07 | <0.001 |
Days 90 to 119 | 0.91 | 0.90–0.92 | <0.001 |
Days 120 to 149 | 1.12 | 1.11–1.14 | <0.001 |
Days 150 to 179 | 1.11 | 1.09–1.12 | <0.001 |
Days 180 to 209 | 0.88 | 0.86–0.89 | <0.001 |
Days 210 to 241 | 0.57 | 0.56–0.58 | <0.001 |
Vaccination type (reference: QIVc) | |||
QIVe | 0.96 | 0.90–1.02 | 0.148 |
LAIV | 0.57 | 0.53–0.61 | <0.001 |
aTIV | 0.74 | 0.70–0.78 | <0.001 |
Note. QIVc: cell culture-based quadrivalent influenza vaccine; egg-based quadrivalent influenza vaccine; LAIV: live attenuated influenza vaccine; aTIV: adjuvanted trivalent influenza vaccine.