Table 3.
Length of search expressions for Cochrane review and Google Scholar searches: number of characters including whitespace
| Review | Cochrane SR * | Google Scholar | Ratio GS/C-SR |
|---|---|---|---|
| Arrol [21] |
1779** |
230 |
0.129 |
| Sinclair [22] |
126 |
170 |
1.349 |
| McQueen [23] |
693 |
144 |
0.208 |
| Bar-On [24] |
387 |
140 |
0.362 |
| Bohlius [25] |
1209 |
219 |
0.181 |
| Boehm [26] |
605 |
218 |
0.36 |
| Guimarães [27] |
862 |
93 |
0.108 |
| Verbeek [28] |
997 |
219 |
0.22 |
| Yip [29] |
357 |
194 |
0.534 |
| Okebe [30] |
135 |
181 |
1.341 |
| Ipser [31] |
1031 |
225 |
0.218 |
| Sultan [32] |
1053 |
97 |
0.092 |
| Oduyebo [33] |
957 |
150 |
0.157 |
| Mestre [34] | 267 | 229 | 0.858 |
*: Number of characters of the documented MEDLINE searches in the Cochrane reviews.
**: Number of characters of the search in the Cochrane Collaboration Depression, Anxiety and Neurosis Controlled Trials Registers (CCDANCTR) prior to the search proper.