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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 3

Illness outcomes for persons reported influenza–like illness, New South Wales, Australia, July–September 2009*

Outcome
Estimated no. persons, millions (95% CI)†
Proportion, % (95% CI)
No. days unable to do usual activities
0–3 0.83 (0.67–1.00) 51.3 (41.4–61.1)
4–7 0.60 (0.44–0.76) 36.7 (26.9–46.5)
>7
0.20 (0.09–0.30)
12.0 (5.7–18.4)
Type of health care sought
General practice 0.90 (0.74–1.06) 55.4 (45.5-65.2)
Hospital 0.08 (0.02–0.15 5.2 (1.3–9.2)
General practice and hospital‡ 0.04 (0.01–0.07 2.3 (0.5–4.1)
Neither general practice nor hospital 0.68 (0.53–0.83) 41.7 (32.3–51.1)

*CI, confidence interval.
†The estimated numbers were obtained by applying the proportions and 95% CIs in this table to the estimated 1.63 million persons with influenza–like illness (Table 1). Standard errors of that estimate were ignored.
‡Because this category overlaps the 2 categories above, total is not 100%.

Main Article

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