Table 1 Results from the electronic search strategies.
| MeSH or keyword | Medline | CINAHL | CDSR, ACP journal club, DARE, CCTR | SPORTDiscus |
|---|---|---|---|---|
| 1 Bone Density (MeSH) or bone mineral density (keyword) or bone density (keyword) | 22562 | 2288 | 2473 | 1123 |
| 2 Contraceptives, Oral (MeSH) or oral contraceptive (keyword) | 34222 | 3649 | 809 | 197 |
| 1 and 2 | 351 | 212 | 30 | 18 |
| Limit to English | 327 | 212 | 17 | |
| Total | 327 | 212 | 30 | 17 |
MeSH, Medical subject heading; CINAHL, cumulative index of nursing and allied health literature; CDSR, Cochrane database of systematic reviews; DARE, database of abstracts of reviews of effects; CCTR, Cochrane central register of controlled trials.