Evidence map›Paper›PMID 25517353›Full record

ArticleJournal of medical Internet research2014

Cumulative query method for influenza surveillance using search engine data.

Dong-Woo Seo, Min-Woo Jo, Chang Hwan Sohn, Soo-Yong Shin, JaeHo Lee, Maengsoo Yu, Won Young Kim, Kyoung Soo Lim, Sang-Il Lee

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Article in Journal of medical Internet research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

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25citing papers in PubMed, 1 pooled it
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3 · Its place in the literature

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25 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  8. Infodemiology and Infoveillance: Scoping Review.Journal of medical Internet research · 2020
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  9. Prediction of Number of Cases of 2019 Novel Coronavirus (COVID-19) Using Social Media Search Index.International journal of environmental research and public health · 2020
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9 authors.

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6 · The paper itself

Abstract

backgroundInternet search queries have become an important data source in syndromic surveillance system. However, there is currently no syndromic surveillance system using Internet search query data in South Korea.

objectivesThe objective of this study was to examine correlations between our cumulative query method and national influenza surveillance data.

methodsOur study was based on the local search engine, Daum (approximately 25% market share), and influenza-like illness (ILI) data from the Korea Centers for Disease Control and Prevention. A quota sampling survey was conducted with 200 participants to obtain popular queries. We divided the study period into two sets: Set 1 (the 2009/10 epidemiological year for development set 1 and 2010/11 for validation set 1) and Set 2 (2010/11 for development Set 2 and 2011/12 for validation Set 2). Pearson's correlation coefficients were calculated between the Daum data and the ILI data for the development set. We selected the combined queries for which the correlation coefficients were .7 or higher and listed them in descending order. Then, we created a cumulative query method n representing the number of cumulative combined queries in descending order of the correlation coefficient.

resultsIn validation set 1, 13 cumulative query methods were applied, and 8 had higher correlation coefficients (min=.916, max=.943) than that of the highest single combined query. Further, 11 of 13 cumulative query methods had an r value of ≥.7, but 4 of 13 combined queries had an r value of ≥.7. In validation set 2, 8 of 15 cumulative query methods showed higher correlation coefficients (min=.975, max=.987) than that of the highest single combined query. All 15 cumulative query methods had an r value of ≥.7, but 6 of 15 combined queries had an r value of ≥.7.

conclusionsCumulative query method showed relatively higher correlation with national influenza surveillance data than combined queries in the development and validation set.

Indexed as

InternetAdultCenters for Disease Control and Prevention, U.S.Data CollectionFemaleHumansInfluenza, HumanMaleMiddle AgedPopulation SurveillanceSearch EngineUnited StatesGoogle Flu Trendsinfluenzainfluenza-like illnessInternet searchquerysyndromic surveillance system

Identifiers

PMID25517353
PMCPMC4275481

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LicenceCC BY
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.