Table 2

Number of citations identified from the electronic databases for studies pertaining to the role of neck strength, rules and legislation in sport concussion prevention

Electronic database Number of neck strength citationsNumber of rules citationsNumber of legislation citations
Ovid MEDLINE (1946–September 2012)6201337428
Ovid Healthstar (1966–November 2012)030
SportDiscuss (1998–2012)000
EMBASE (1980–2012 week 50)1222
PubMed (1960–September 2012)3179
CINAHL (1998–September 2012)030
Ovid OLDMEDLINE (1946–1965)000
Cochrane Database of Systematic Reviews (2005–November 2012)000
Database of Abstracts of Reviews of Effects (4th Quarter 2012)000
AMED—Allied and Complementary Medicine (1985–December 2012)020