tetano
Editor, Senior Moderator
J Biomed Semantics. 2011 Oct 6;2 Suppl 5:S9.
OMG U got flu? Analysis of shared health messages for bio-surveillance.
Collier N, Son NT, Nguyen NM.
Source
National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku,Tokyo, Japan. collier@nii.ac.jp.
Abstract
BACKGROUND:
Micro-blogging services such as Twitter offer the potential to crowdsource epidemics in real-time. However, Twitter posts ('tweets') are often ambiguous and reactive to media trends. In order to ground user messages in epidemic response we focused on tracking reports of self-protective behaviour such as avoiding public gatherings or increased sanitation as the basis for further risk analysis.
RESULTS:
We created guidelines for tagging self protective behaviour based on Jones and Salath? (2009)'s behaviour response survey. Applying the guidelines to a corpus of 5283 Twitter messages related to influenza like illness showed a high level of inter-annotator agreement (kappa 0.86). We employed supervised learning using unigrams, bigrams and regular expressions as features with two supervised classifiers (SVM and Naive Bayes) to classify tweets into 4 self-reported protective behaviour categories plus a self-reported diagnosis. In addition to classification performance we report moderately strong Spearman's Rho correlation by comparing classifier output against WHO/NREVSS laboratory data for A(H1N1) in the USA during the 2009-2010 influenza season.
CONCLUSIONS:
The study adds to evidence supporting a high degree of correlation between pre-diagnostic social media signals and diagnostic influenza case data, pointing the way towards low cost sensor networks. We believe that the signals we have modelled may be applicable to a wide range of diseases.
PMID:
22166368
[PubMed - in process]
PMCID: PMC3239309
Free full text
http://www.ncbi.nlm.nih.gov/pubmed/22166368
OMG U got flu? Analysis of shared health messages for bio-surveillance.
Collier N, Son NT, Nguyen NM.
Source
National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku,Tokyo, Japan. collier@nii.ac.jp.
Abstract
BACKGROUND:
Micro-blogging services such as Twitter offer the potential to crowdsource epidemics in real-time. However, Twitter posts ('tweets') are often ambiguous and reactive to media trends. In order to ground user messages in epidemic response we focused on tracking reports of self-protective behaviour such as avoiding public gatherings or increased sanitation as the basis for further risk analysis.
RESULTS:
We created guidelines for tagging self protective behaviour based on Jones and Salath? (2009)'s behaviour response survey. Applying the guidelines to a corpus of 5283 Twitter messages related to influenza like illness showed a high level of inter-annotator agreement (kappa 0.86). We employed supervised learning using unigrams, bigrams and regular expressions as features with two supervised classifiers (SVM and Naive Bayes) to classify tweets into 4 self-reported protective behaviour categories plus a self-reported diagnosis. In addition to classification performance we report moderately strong Spearman's Rho correlation by comparing classifier output against WHO/NREVSS laboratory data for A(H1N1) in the USA during the 2009-2010 influenza season.
CONCLUSIONS:
The study adds to evidence supporting a high degree of correlation between pre-diagnostic social media signals and diagnostic influenza case data, pointing the way towards low cost sensor networks. We believe that the signals we have modelled may be applicable to a wide range of diseases.
PMID:
22166368
[PubMed - in process]
PMCID: PMC3239309
Free full text
http://www.ncbi.nlm.nih.gov/pubmed/22166368