Table 3 Risk ratio for flu infectionin 306 children who received and did not receive flu vaccination (multivariate analysis). (a) all influenza infections, (b) influenzaA infections, (c) influenzaB infections.
Variable | Risk ratio | 95% Confidence interval | P value |
|---|---|---|---|
(a) For all flu infection | |||
Received flu vaccines (reference: no vaccines) | 0.21 | 0.11–0.38 | < 0.0001 |
Female (reference: male) | 1.49 | 0.92–2.42 | 0.10 |
Age at onset of NS | 0.90 | 0.84–0.97 | 0.003 |
Past history of FRNS or SDNS or SRNS (reference: no history of FRNS or SDNS or SRNS) | 0.77 | 0.47–1.23 | 0.27 |
On February (reference: other months) | 16.58 | 10.23–26.89 | < 0.0001 |
(b) For flu A infection | |||
Received flu vaccines (reference: no vaccines) | 0.21 | 0.09–0.50 | 0.0004 |
Female (reference: male) | 1.78 | 0.89–3.58 | 0.10 |
Age at onset of NS | 0.91 | 0.83–1.00 | 0.053 |
Past history of FRNS or SDNS or SRNS (reference: no history of FRNS or SDNS or SRNS) | 0.53 | 0.29–1.05 | 0.07 |
On February (reference: other months) | 19.80 | 9.64–40.65 | < 0.0001 |
(c) For flu B infection | |||
Received flu vaccines (reference: no vaccines) | 0.20 | 0.09–0.46 | 0.0002 |
Female (reference: male) | 1.27 | 0.65–2.50 | 0.48 |
Age at onset of NS | 0.90 | 0.82–0.99 | 0.027 |
Past history of FRNS or SDNS or SRNS (reference: no history of FRNS or SDNS or SRNS) | 1.08 | 0.54–2.14 | 0.83 |
On February (reference: other months) | 14.27 | 7.40–27.50 | < 0.0001 |
