Sources of studies for the review
| Source | All relevant studies | Studies finally included | ||
|---|---|---|---|---|
| Number | % Of total | Number | % Of total | |
| First line health databases | ||||
| Found in CINAHL, Cochrane Library (CDSR and CCTR), Embase, Medline, PreMedline, or PsycInfo | 4 | 6 | 3 | 14 |
| First line science databases | ||||
| Found in ASSIA, IBSS, Sociological Abstracts, or Web of Science (SCI or SSCI) | 7 | 3 | ||
| Found in reference list of another document indexed in one of these databases | 1 | – | ||
| First line science databases (total) | 8 | 12 | 3 | 14 |
| Other specialist databases | ||||
| Found in Dissertation Abstracts, Geobase, HELMIS, HMIC, Index to Theses, PapersFirst, REGARD, or SportDiscus | 8 | 12 | 2 | 9 |
| Transport database | ||||
| Found in Transport | 30 | 7 | ||
| Found in reference list of another document indexed in Transport | 3 | 2 | ||
| Transport database (total) | 33 | 48 | 9 | 41 |
| Purposive search of web sites | 9 | 13 | 2 | 9 |
| Reviewers’ own collections | – | – | ||
| Experts’ recommendations | – | – | ||
| Found by chance | ||||
| Found in a book or set of conference proceedings ordered for another document | 6 | 2 | ||
| Found by unstructured web browsing | 1 | 1 | ||
| Found by chance (total) | 7 | 10 | 3 | 14 |
| Total | 69 | 22 | ||