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Table 3 Average number of documents retrieved by CISS and the three other approaches in Portuguese

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

Search engine

+§

+/-§

-/+§

-§

Mean‡

Median†

Google

0.7

0.7

3.2

3.3

157529.3

4810.0

Google scholar

0.1

0.4

4.2

2.2

2180.6

218.5

PubMed

1.0

0.4

1.1

1.5

1789.8

0.0

CISS

3.2

1.2

1.0

0.0

7.9

6.0

  1. §Columns relative to the 10 first results for each query at each engine.
  2. ‡Mean of all results for each query.
  3. †Median of all results for each query.
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BMC Medical Genomics

ISSN: 1755-8794

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