Table 1.
Aspects of queries sent to PubMed.
| Aspects | All queries (N = 3205) |
| n(%) | |
| AND used * | 1409(44) |
| OR used * | 22(0.7) |
| NOT used * | 6(0.2) |
| wildcard used † | 65(2) |
| Mesh or Limits used ‡ | 252(8) |
| Query result positive § | 2521(79) |
| Abstract selected || | 999(31) |
| Full text selected || | 456(14) |
* Boolean operators. † Asterisk functions as wildcard. ‡ All limits or Mesh terms were identified by the use of square brackets in a query. § One or more article titles retrieved by query. || Queries that resulted in the selection of abstract or full-text articles for further reading.