Electronic search strategy for clinical studies on protective equipment use and concussion, with number of identified citations
| Electronic database | Search strategy | Number of helmet/headgear citations | Number of mouth guard citations | Number of face shield citations |
|---|---|---|---|---|
| Ovid MEDLINE (2008–19 September 2012) | 1 OR 2 OR 3 | 107 | 95 | 8 |
| Ovid Healthstar (2008–19 September 2012) | 1 OR 2 OR 3 | 99 | 90 | 8 |
| SportDiscuss (2008–September 2012) | 1 OR 2 OR 3 | 55 | 80 | 3 |
| EMBASE (2008–19 September 2012) | 1 OR 2 OR 3 | 198 | 114 | 20 |
| PubMed (2008–19 September 2012) | 1 OR 2 OR 3 | 60 | 10 | 4 |
| CINAHL (2008–September 2012) | 1 OR 2 OR 3 | 2 | 23 | 1 |
| Ovid OLDMEDLINE (2008–19 September 2012) | 1 OR 2 OR 3 | 0 | 0 | 0 |
| Cochrane Database of Systematic Reviews (2008–19 September 2012) | 1 OR 2 OR 3 | 1 | 0 | 0 |
| Database of Abstracts of Reviews of Effects (2008–19 September 2012) | 1 OR 2 OR 3 | 7 | 5 | 1 |
| Cochrane Central Register of Controlled Trials (2008–19 September 2012) | 1 OR 2 OR 3 | 5 | 4 | 0 |
| AMED—Allied and Complementary Medicine (2008–19 September 2012) | 1 OR 2 OR 3 | 3 | 0 | 1 |