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Volume 17, Number 9—September 2011

Research

Differential Effects of Pandemic (H1N1) 2009 on Remote and Indigenous Groups, Northern Territory, Australia, 2009

James McCracken TrauerComments to Author , Karen Louise Laurie, Joseph McDonnell, Anne Kelso, and Peter Gregory Markey
Author affiliations: Author affiliations: Centre for Disease Control, Tiwi, Northern Territory, Australia (J.M. Trauer, P.G. Markey); World Health Organization Collaborating Centre for Reference and Research in Influenza, North Melbourne, Victoria, Australia (K.L. Laurie, A. Kelso); Menzies School of Health Research, Tiwi (J. McDonnell)

Main Article

Table 2

Specimens with titers >40 in a study of differential effects of pandemic (H1N1) 2009 on remote and indigenous groups, Northern Territory, Australia, September 2009*

Population group
No. positive/ no. tested
% Titers >40
(95% CI)
Baseline, age, y
<14 0/37 0
15–34 4/91 4.4 (0.1–8.6)
35–54 8/92 8.7 (2.9–14.5)
>55
22/225
9.8 (5.9–13.7)
Urban Darwin, age, y
<14 22/60 36.7 (24.3–49.0)
15–34 34/194 17.5 (12.2–22.9)
35–54 23/202 11.4 (7.0–15.8)
>55
20/209
9.6 (5.6–13.6)
Rural Top End, age, y
<14 5/25 20.0 (4.0–36.0)
15–34 46/190 24.2 (18.1–30.3)
35–54 31/183 16.9 (11.5–22.4)
>55
35/190
18.4 (12.9–24.0)
Central Australia, age, y
<14 7/13 53.9 (25.6–82.1)
15–34 23/84 27.4 (17.8–37.0)
35–54 50/189 26.5 (20.1–32.8)
>55 33/150 22.0 (15.3–28.7)

*CI, confidence interval.

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