From: Surveillance for the prevention of chronic diseases through information association
Search engine | +§ | +/-§ | -/+§ | -§ | Mean‡ | Median† |
---|---|---|---|---|---|---|
1.0 | 0.2 | 3.0 | 4.2 | 14028687 | 255000 | |
Google scholar | 1.2 | 0.6 | 3.6 | 1.4 | 12058.8 | 1190 |
PubMed | 0.0 | 0.8 | 1.2 | 0.2 | 18.0 | 0.0 |
CISS | 0.4 | 1.2 | 0.8 | 0.0 | 2.4 | 1.0 |