Table 1 Overview of searched databases, trial and dissertation registers and conference proceedings, and the number of references found
Number | Discipline | Database | Searched time period | References found, n |
|---|---|---|---|---|
1 | Education | Academic Search Premier | 1975 to Feb 2007 | 1040 |
2 | Medicine | AMED | 1985 to Feb 2007 | 623 |
3 | Education | ASSIA | 1987 to March 2007 | 353 |
4 | Â | AEI | 1979 to Feb 2007 | 84 |
5 | Â | BEI | 1975 to Feb 2007 | 18 |
6 | Medicine | BNI | 1985 to Feb 2007 | 54 |
7 | Â | CINAHL | 1982 to Feb 2007 | 1606 |
8 | Â | Cochrane Library | 1948/1995 to march 2007 | 363 |
9 | Â | Digital dissertations | 1930 to March 2007 | 30 |
10 | Â | DIMDI | 1967 to March 2007 | 130 |
11 | Sports | EMAERALD | 1965 to March 2007 | 134 |
12 | Education | ERIC | 1966 to Feb 2007 | 795 |
13 | Medicine | GMS meetings | 2002 to March 2007 | 1 |
14 | Â | ISI Proceedings | 1990 to March 2007 | 241 |
15 | Music | JSTOR | 1665 (1800) to Feb 2007 | 200 |
16 | Psychology | PsycINFO | 1887 to Feb 2007 | 4588 |
17 | Music | RILM | 1967 to March 2007 | 180 |
18 | Medicine | Scopus | 1996 to Feb 2007 | 2550 |
19 | Sports | SPORTDiscus | 1800 to Feb 2007 | 4023 |
20 | Sports | SPORLIT, SPOFOR, SPORMED | 1974 to Jan 2007 | 589 |
21 | Medicine | ClinicalTrials.gov | 1997 to March 2007 | 12 |
22 | Â | ISRCTN | 1998 March 2007 | 2 |
23 | Â | National Research Register | 2000 to March 2007 | 16 |
24 | Â | Web of Science | 1970 to March 2007 | 2837 |
25 | Â | Zetoc | 1993 to March 2007 | 1270 |
Total | Â | Â | Â | 21,739 |