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Volume 17, Number 9—September 2011


Seroepidemiologic Study of Pandemic (H1N1) 2009 during Outbreak in Boarding School, England

Sandra Johnson, Chikwe IhekweazuComments to Author , Pia Hardelid, Nika Raphaely, Katja Hoschler, Alison Bermingham, Muhammad Abid, Richard Pebody, Graham Bickler, John Watson, and Éamonn O’Moore
Author affiliations: Author affiliations: Health Protection Agency, London, UK (S. Johnson, C. Ihekweazu, P. Hardelid, K. Hoschler, A. Bermingham, R. Pebody, G. Bickler, J. Watson); Health Protection Agency, Oxfordshire, UK (N. Raphaely, M. Abid, É. O’Moore)

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Table 4

Multivariable analysis of staff only in relation to having ARI or serology-confirmed infection during outbreak of pandemic (H1N1) 2009, England*

AOR (95% CI) for ARI in questionnaire sample
AOR (95% CI) for positive test result in matched sample
Age group, y
20–49 1 1
0.71 (0.32–1.57)
0.91 (0.26–3.14)
Nonteaching 1 1
1.18 (0.56–2.52)
7.47 (2.31–24.18)
Took antiviral drugs for PEP†
No 1 1
0.34 (0.15–0.77)
0.66 (0.18–2.39)
Seasonal influenza vaccine 1
No 1 0.76 (0.35–1.67)
Yes 2.36 (0.69–8.11) 2.36 (0.69–8.11)

*n = 226. ARI, acute respiratory infection; AOR, adjusted odds ratio; CI, confidence interval; PEP, postexposure prophylaxis.
†Persons who reported taking the treatment dose of antiviral drugs were excluded.

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