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Table 4 Accuracy of the results retrieved by CISS and the 3 other approaches in Portuguese

From: Surveillance for the prevention of chronic diseases through information association

Search Engine Google Google scholar PubMed CISS
% queries at whichthe search engineachieved the bestresults ((+) and (+/-)) 15% 15% 10% 60%
Accuracy (precision) 0.14 0.05 0.14 0.61