Comparison of search strategies for recalling double-blind trials from MEDLINE.

摘要: To minimise the effect of reference bias in literature retrieval, it is important to use computerised search strategies that give a high yield relevant reports. In MEDLINE included Medical Subject Heading (MeSH) "Comparative study," recall double-blind trials NSAIDs rheumatoid arthritis was 93.1% (122/131) and precision 19.0% (122/641). When "Double-blind method" used, either as MeSH or text words, only 72.5% (95/131) with 22.7% (95/419). A combined strategy increased 97.7% (128/131) 17.3% (128/738). With term "Random allocation" eight reports were retrieved, none new. By using "Clinical trials" alone, we would have missed eleven We conclude study" preferable when searching on MEDLINE.