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Volume 17, Number 7—July 2011

Research

Epidemiology of Influenza-like Illness during Pandemic (H1N1) 2009, New South Wales, Australia

David J. MuscatelloComments to Author , Margo Barr, Sarah V. Thackway, and C. Raina MacIntyre
Author affiliations: Author affiliations: New South Wales Department of Health, North Sydney, New South Wales, Australia (D.J. Muscatello, M. Barr, S. Thackway); University of New South Wales, Kensington, New South Wales, Australia (D.J. Muscatello, C.R. MacIntyre); University of Wollongong, Wollongong, New South Wales, Australia (M. Barr)

Main Article

Table 7

Effectiveness of seasonal influenza vaccine against influenza-like illness, New South Wales, Australia, July–September 2009*

Subgroup, n = 2,888
Vaccine effectiveness, % (95% CI)†
Age, y
0.5–15 6.1 (−120.1 to 60.0)
16–34 44.6 (−166.8 to 88.5)
35–49 −0.9 (−137.2 to 57.1)
50–64 33.7 (−69.7 to 74.1)
>65
−97.9 (−622.5 to 45.8)
Sex†
M 34.5 (−71.7 to 75.0)
F
10.5 (−49.2 to 46.4)
Region†
Urban 17.1 (−55.7 to 55.9)
Rural
25.5 (−49.7 to 62.9)
Smoking status†
Daily smoker 1.4 (−175.3 to 64.7)
Not daily smoker
22.3 (−53.2 to 60.6)
Body mass index†
Obese 25.0 (−81.6 to 69.1)
Not obese
9.2 (−66.0 to 50.4)
Overall†
20.0 (−30.5 to 51.0)
*For persons >6 mo of age vaccinated in past 12 mo. CI, confidence interval.
†Adjusted for age.

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