Table 2.

Mean performances of the four search strategies for the 26,636 Medical Subject Heading descriptors.

KOSa	Precision (%), mean (SD)	Recall (%), mean (SD)	F-measure (%), mean (SD)
ATMb	44 (24)	31 (29)	28 (23)
MeSHc	51 (23)	38 (31)	35 (24)
CISMeFd	49 (23)	40 (31)	35 (24)
UMLSe	49 (23)	46 (31)	36 (24)

^aKOS: knowledge organization system.

^bATM: automatic term mapping.

^cMeSH: Medical Subject Headings.

^dCISMeF: Catalogue et Index des Sites Médicaux de langue Française.

^eUMLS: Unified Medical Language System.