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Volume 22, Number 6—June 2016

Heterogeneous and Dynamic Prevalence of Asymptomatic Influenza Virus Infections

Luis Furuya-Kanamori, Mitchell Cox, Gabriel J. Milinovich, Ricardo J. Soares Magalhaes, Ian M. Mackay, and Laith YakobComments to Author 
Author affiliations: Australian National University, Acton, Australian Capital Territory, Australia (L. Furuya-Kanamori); University of Queensland, Herston, Queensland, Australia (M. Cox, G.J. Milinovich, R.J. Soares Magalhaes); Queensland University of Technology, Kelvin Grove, Queensland, Australia (I.M. Mackay); London School of Hygiene and Tropical Medicine, London, UK (L. Yakob)

Main Article

Table 1

Heterogeneity within asymptomatic and subclinical influenza infection cases, by virus type/subtype, as determined through a systematic review and meta-analysis of 55 studies

Prevalence (95% CI)
Cochran’s Q
p value (Cochran’s Q)
I2,* %
All types of influenza 19.1 (5.2–35.5) 752.40 <0.001 97
Influenza A 21.0 (4.2–41.0) 692.94 <0.001 98
Influenza A(H1N1)
22.7 (7.7–39.8)
All types of influenza 43.4 (25.4–61.8) 1768.24 <0.001 97
Influenza A 42.8 (22.3–63.9) 1689.78 <0.001 98
Influenza A(H1N1) 39.8 (16.4–64.5) 1388.54 <0.001 98

*The I² statistic describes the percentage of variation across studies that is attributable to heterogeneity rather than chance.

Main Article

Page created: May 16, 2016
Page updated: May 16, 2016
Page reviewed: May 16, 2016
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