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Incidence of influenza
| Subjects diagnosed with Influenza (n/total n (%)) | RR | 95% CI | P value | ||
|---|---|---|---|---|---|
| Nonconsumption group | Consumption group | ||||
| First period | |||||
| All subjects analysed | 2/1089 (0·2) | 0/694 (0·0) | – | – | 0·259 |
| Second period | |||||
| All subjects analysed | 166/694 (23·9) | 171/1089 (15·7) | 0·656 | 0·542, 0·795 | < 0·001 |
| Vaccinated subjects | 70/356 (19·7) | 70/466 (15·0) | 0·764 | 0·565, 1·032 | 0·079 |
| Unvaccinated subjects | 96/335 (28·7) | 101/620 (16·3) | 0·568 | 0·445, 0·727 | < 0·001 |
RR, relative risk; CI, confidence interval.
