dc.contributor.author | Caini, Saverio | |
dc.contributor.author | Spreeuwenberg, Peter | |
dc.contributor.author | Kusznierz, Gabriela F. | |
dc.contributor.author | Rudi, Juan Manuel | |
dc.contributor.author | Owen, Rhonda | |
dc.contributor.author | Pennington, Kate | |
dc.contributor.author | Wangchuk, Sonam | |
dc.contributor.author | Gyeltshen, Sonam | |
dc.contributor.author | Ferreira de Almeida, Walquiria Aparecida | |
dc.contributor.author | Henriques, Claudio Maierovitch Pessanha | |
dc.contributor.author | Njouom, Richard | |
dc.contributor.author | Vernet, Marie-Astrid | |
dc.contributor.author | Fasce, Rodrigo A. | |
dc.contributor.author | de Mora, Domenica | |
dc.contributor.author | De Lozano, Celina | |
dc.contributor.author | Zambon, Maria | |
dc.contributor.author | Pebody, Richard | |
dc.contributor.author | Castillo, Leticia | |
dc.contributor.author | Clara, Alexey W. | |
dc.contributor.author | Matute, Maria Luisa | |
dc.contributor.author | Kosasih, Herman | |
dc.contributor.author | Nurhayati | |
dc.contributor.author | Puzelli, Simona | |
dc.contributor.author | Rizzo, Caterina | |
dc.contributor.author | Kadjo, Herve A. | |
dc.contributor.author | Daouda, Coulibaly | |
dc.contributor.author | Kiyanbekova, Lyazzat | |
dc.contributor.author | Ospanova, Akerke | |
dc.contributor.author | Mott, Joshua A. | |
dc.contributor.author | Emukule, Gideon O. | |
dc.contributor.author | Heraud, Jean-Michel | |
dc.contributor.author | Razanajatovo, Norosoa Harline | |
dc.contributor.author | Barakat, Amal | |
dc.contributor.author | El Falaki, Fatima | |
dc.contributor.author | Huang, Sue Q. | |
dc.contributor.author | Lopez, Liza | |
dc.contributor.author | Balmaseda, Angel | |
dc.contributor.author | Moreno, Brechla | |
dc.contributor.author | Rodrigues, Ana Paula | |
dc.contributor.author | Guiomar, Raquel | |
dc.contributor.author | Ang, Li Wei | |
dc.contributor.author | Lee, Vernon Jian Ming | |
dc.contributor.author | Venter, Marietjie | |
dc.contributor.author | Cohen, Cheryl | |
dc.contributor.author | Badur, Selim | |
dc.contributor.author | Ciblak, Meral A. | |
dc.contributor.author | Mironenko, Alla | |
dc.contributor.author | Holubka, Olha | |
dc.contributor.author | Bresee, Joseph | |
dc.contributor.author | Brammer, Lynnette | |
dc.contributor.author | Hoang, Phuong Vu Mai | |
dc.contributor.author | Quynh Le, Mai Thi | |
dc.contributor.author | Fleming, Douglas | |
dc.contributor.author | Seblain, Clotilde El-Guerche | |
dc.contributor.author | Schellevis, François | |
dc.contributor.author | Paget, John | |
dc.contributor.author | Global Influenza B Study group | |
dc.date.accessioned | 2019-05-07T10:09:20Z | |
dc.date.available | 2019-05-07T10:09:20Z | |
dc.date.issued | 2018-06-08 | |
dc.description | Table S1. Number of influenza cases caused by the difference influenza viruses that were included in the analysis. The Global Influenza B Study, 1999-2014. | en_ZA |
dc.description | Figure S1. Forest plot of the Relative Illness Ratio for patients aged 0-4 years infected with A(H1N1) influenza virus. The Global Influenza B Study, 1999-2014. Figure S2. Forest plot of the Relative Illness Ratio for patients aged 5-17 years infected with A(H1N1) influenza virus. The Global Influenza B Study, 1999-2014. Figure S3. Forest plot of the Relative Illness Ratio for patients aged 18-39 years infected with A(H1N1) influenza virus. The Global Influenza B Study, 1999-2014. Figure S4. Forest plot of the Relative Illness Ratio for patients aged 40-64 years infected with A(H1N1) influenza virus. The Global Influenza B Study, 1999-2014. Figure S5. Forest plot of the Relative Illness Ratio for patients aged 65+ years infected with A(H1N1) influenza virus. The Global Influenza B Study, 1999-2014. | en_ZA |
dc.description | Table S2. Summary Relative Illness Ratio (sRIR), 95% confidence intervals (95% CI) across age groups and influenza viruses by categories of country ageing index. The Global Influenza B Study, 1999- 2014. Table S3. Summary Relative Illness Ratio (sRIR), 95% confidence intervals (95% CI) across age groups and influenza viruses by percentage of outpatients among cases reported to the influenza surveillance system. The Global Influenza B Study, 1999-2014. Table S4. Summary Relative Illness Ratio (sRIR), 95% confidence intervals (95% CI) across age groups and influenza viruses by country latitude. The Global Influenza B Study, 1999-2014. Table S5. Summary Relative Illness Ratio (sRIR), 95% confidence intervals (95% CI) across age groups and influenza viruses by percentage of influenza cases caused by that influenza virus in the same season. The Global Influenza B Study, 1999-2014. Table S6. Summary Relative Illness Ratio (sRIR), 95% confidence intervals (95% CI) across age groups and influenza viruses by percentage of influenza cases caused by that influenza virus in the previous season. The Global Influenza B Study, 1999-2014. Table S7. Summary Relative Illness Ratio (sRIR), 95% confidence intervals (95% CI) across age groups and influenza viruses by categories of country gross domestic product (GDP) per capita. The Global Influenza B Study, 1999-2014. | en_ZA |
dc.description.abstract | BACKGROUND : Influenza disease burden varies by age and this has important public health implications. We compared the proportional distribution of different influenza virus types within age strata using surveillance data from twenty-nine countries during 1999-2014 (N=358,796 influenza cases). METHODS : For each virus, we calculated a Relative Illness Ratio (defined as the ratio of the percentage of cases in an age group to the percentage of the country population in the same age group) for young children (0-4 years), older children (5-17 years), young adults (18-39 years), older adults (40-64 years), and the elderly (65+ years). We used random-effects meta-analysis models to obtain summary relative illness ratios (sRIRs), and conducted metaregression and sub-group analyses to explore causes of between-estimates heterogeneity. RESULTS : The influenza virus with highest sRIR was A(H1N1) for young children, B for older children, A(H1N1) pdm2009 for adults, and (A(H3N2) for the elderly. As expected, considering the diverse nature of the national surveillance datasets included in our analysis, between-estimates heterogeneity was high (I2>90%) for most sRIRs. The variations of countries’ geographic, demographic and economic characteristics and the proportion of outpatients among reported influenza cases explained only part of the heterogeneity, suggesting that multiple factors were at play. CONCLUSIONS : These results highlight the importance of presenting burden of disease estimates by age group and virus (sub)type. | en_ZA |
dc.description.department | Medical Virology | en_ZA |
dc.description.librarian | am2019 | en_ZA |
dc.description.sponsorship | The Global Influenza B Study is funded by an unrestricted research grant from Sanofi Pasteur. | en_ZA |
dc.description.uri | https://bmcinfectdis.biomedcentral.com | en_ZA |
dc.identifier.citation | Caini, S., Spreeuwenberg, P., Kusznierz, G.F. et al. 2018, 'Distribution of influenza virus types by age using case-based global surveillance data from twenty-nine countries, 1999-2014', BMC Infectious Diseases, vol. 18, art. 269, pp. 1-10. | en_ZA |
dc.identifier.issn | 1471-2334 (online) | |
dc.identifier.other | 10.1186/s12879-018-3181-y | |
dc.identifier.uri | http://hdl.handle.net/2263/69068 | |
dc.language.iso | en | en_ZA |
dc.publisher | BioMed Central | en_ZA |
dc.rights | © The Author(s). 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License. | en_ZA |
dc.subject | Influenza | en_ZA |
dc.subject | Age distribution | en_ZA |
dc.subject | Influenza A virus | en_ZA |
dc.subject | H3N2 subtype | en_ZA |
dc.subject | Influenza A virus | en_ZA |
dc.subject | H1N1 subtype | en_ZA |
dc.subject | Influenza B virus | en_ZA |
dc.subject | Meta-analysis | en_ZA |
dc.title | Distribution of influenza virus types by age using case-based global surveillance data from twenty-nine countries, 1999-2014 | en_ZA |
dc.type | Article | en_ZA |