Table 2.
Crude and adjusted 2010/2011 influenza VE estimates by outcome
| Outcome | n events/person‐years Amongst unvaccinated (%) | n events/person‐years Amongst vaccinated (%) | Crude VE, % (95% CI) | Adjusted VE, %a (95% CI) |
|---|---|---|---|---|
| ILI |
8453/462 927 (1·83) |
934/68 378 (1·37) |
25·2 (20·0, 30·1) |
37·8 (32·3, 43·0) |
| LRTI |
4843/462 927 (1·05) |
1717/68 378 (2·51) |
−140·0 (−153·6, −127·2) |
−0·5 (−7·0, 7·5) |
| ARTI |
58 752/462 927 (12·69) |
7512/68 378 (10·99) |
13·4 (11·3, 15·5) |
−8·0 (−11·4. −4·7) |
| PCR‐confirmed (any type) |
1172/342 556 (0·34) |
68/51 438 (0·13) |
61·4 (50·7, 69·7) |
47·4 (29·0. 61·0) |
| PCR‐confirmed influenza A |
691/342 556 (0·19) |
40/51 438 (0·08) |
61·4 (47·0, 72·0) |
50·0 (25·9, 65·6) |
| PCR‐confirmed influenza B |
481/342 556 (0·14) |
28/51 438 (0·05) |
61·2 (43·3, 73·5) |
44·4 (10·1, 65·6) |
a
Adjusted for underlying chronic condition, number of consultations in the 12 months prior to the study period and region.