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