2009AA MedDRA Source Information

Counts

 (skip to: notes  samples)

Term Type	Description	Count (MRCONSO.RRF)
LT	Lower Level Term	57556
PT	Designated preferred name	18209
OL	Non-current Lower Level Term	9031
HT	Hierarchical term	1688
MTH_LT	MTH Lower Level Term	581
HG	High Level Group Term	332
MTH_PT	Metathesaurus preferred term	224
MTH_HT	MTH Hierarchical term	205
SMQ	Standardised MedDRA Query	151
MTH_OL	MTH Non-current Lower Level Term	136
MTH_HG	MTH High Level Group Term	63
MTH_SMQ	Metathesaurus version of Standardised MedDRA Query	28
AB	Abbreviation in any source vocabulary	26
OS	System-organ class in the WHO Adverse Reaction Terminology	26
XM	Cross mapping set	2
MTH_OS	MTH System-organ class	1

Notes

• A term type indicates the role an atom plays in its source
• An atom is the smallest unit of naming in a source; that is, a specific string with specific code values and identifiers from a specific source.
• Every atom has a separate row in MRCONSO.RRF. Every atom is assigned a term type.
• Term types are assigned based on source documentation or NLM understanding of the source.
• Sample data are provided for every term type in the source (see below).
• See Appendix B3 for a list of all term type abbreviations and their full names.
• See Appendix B.5 for a list of sources and their associated term types, listed in default order of precedence.
• See Section 2.7.1.3.14 of UMLS Documentation for more information on MRCONSO.RRF.

Sample Data