J Med Syst - Information extraction approaches to unconventional data sources for Injury Surveillance System: the case of newspapers clippings.

Tópicos

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Resumo

Injury Surveillance Systems based on traditional hospital records or clinical data have the advantage of being a well established, highly reliable source of information for making an active surveillance on specific injuries, like choking in children. However, they suffer the drawback of delays in making data available to the analysis, due to inefficiencies in data collection procedures. In this sense, the integration of clinical based registries with unconventional data sources like newspaper articles has the advantage of making the system more useful for early alerting. Usage of such sources is difficult since information is only available in the form of free natural-language documents rather than structured databases as required by traditional data mining techniques. Information Extraction (IE) addresses the problem of transforming a corpus of textual documents into a more structured database. In this paper, on a corpora of Italian newspapers articles related to choking in children due to ingestion/inhalation of foreign body we compared the performance of three IE algorithms- (a) a classical rule based system which requires a manual annotation of the rules; (ii) a rule based system which allows for the automatic building of rules; (b) a machine learning method based on Support Vector Machine. Although some useful indications are extracted from the newspaper clippings, this approach is at the time far from being routinely implemented for injury surveillance purposes.

Resumo Limpo

injuri surveil system base tradit hospit record clinic data advantag well establish high reliabl sourc inform make activ surveil specif injuri like choke children howev suffer drawback delay make data avail analysi due ineffici data collect procedur sens integr clinic base registri unconvent data sourc like newspap articl advantag make system use earli alert usag sourc difficult sinc inform avail form free naturallanguag document rather structur databas requir tradit data mine techniqu inform extract ie address problem transform corpus textual document structur databas paper corpora italian newspap articl relat choke children due ingestioninhal foreign bodi compar perform three ie algorithm classic rule base system requir manual annot rule ii rule base system allow automat build rule b machin learn method base support vector machin although use indic extract newspap clip approach time far routin implement injuri surveil purpos

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