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Multiple Search Concepts

Introduction

A search term for each important concept in a search question is placed in a separate row of the Word Entry Boxes.

Search Term

A search term is any term or phrase that is searched in a CA on CD database to retrieve records that contain the term.

Types of Search Terms

Search terms:

• are words, numbers, or alphanumerics
• can be single words or phrases (depending on the index they are in)
• may incorporate Wild Cards

Example

Consider the following search question:

Find references to papers on the role of tamoxifen (CAS Registry Number = 10540-29-1] in the treatment of breast cancer in women.

Concepts	Search Terms
Tamoxifen	CAS RN = 10540-29-1 Note: Use a CAS RN as a search term rather than a substance name for the most reliable retrieval of substance information
Breast cancer	Breast cancer(s)
Women	Women, woman, or female(s) Note: Include synonyms

Note

The number of concepts used in a search affects the precision of answers in the search results:

• Using more concepts makes the search more precise
• Using fewer concepts makes the search more comprehensive