What’s all this MeSH?. An introduction to Medical Subject Headings www.bradfordvts.co.uk. From the guru of EBM -.
An introduction to
Medical Subject Headings
‘MEDLINE is the best general source of current best evidence at present because of its breadth and constant maintenance. Thus, it is important to evidence-based practice that clinicians develop and hone MEDLINE searching skills and acquire local access.’
Evidence-based Medicine: how to practice & teach EBM - Sackett D L et al 1998
1 *asthma 7517
2 asthma/ 9108
3 asthma.tw. 9795
4 1 not 3 1000
5 2 not 3 1780
6 3 not 2 2467
‘The diagnosis of porphyria was not recognized then and other names were used such as ..... asthmaspasmodica flatulentum .....’
1 *self-help groups 445
2 support groups.tw. 257
3 *asthma 7708
4 1 or 2 615
5 3 and 4 6
6 self-help groups/ 798
7 6 and 3 6
8 7 not 5 2
Medline for other questions - general information, epidemiology, aetiology, surgical techniques etcThe right place to look
Apart from Knowledge Finder which uses fuzzy logic
The different parts of each item on a database are called fields, and most can be searched individually. In Ovid
= 949 irrelevant articles - at least!!
Ray J G & Vermeulen M J
BMJ 1996 313:1658-9
and no doubt there’s more!!
This can be used to overcome some of the problems of free text searching. Different wild cards are used by different systems. Mainly * $ and ?
Can be used at the end of a word for truncation eg pregnan$ or in the middle for spelling variants eg wom?n, an?emia
MeSH headings are updated annually