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Truncation Symbols
Ovid | PubMed | Science Citation Index | STAT!Ref | TUSK

 

Library Catalog

  • Wildcard: single asterisk (*)
    • Retrieves 0-5 characters in place of the asterisk. Two asterisks (**) replaces an infinite number of characters.
    • Useful for retrieving documents with British and American word variants. For example:
      colo*r
      retrieves documents with the words color and colour.

Ovid (MEDLINE, EBM Reviews, PsychINFO, CANCERLIT, et al.)

  • Unlimited truncation: dollar sign ($) or colon (:)
    • Retrieves any number of characters after the word stem or no characters.
    • Example: disease$ retrieves the word disease, as well as the words diseases, diseased, etc.
  • Wildcard: question mark (?)
    • Use within or at the end of a word to substitute for one character or no characters.
    • Useful for retrieving documents with British and American word variants.
    • Example: colo?r retrieves documents with the words color and colour.

PubMed

  • Unlimited Truncation: asterisk (*)
    • Searches for the first 150 variations of a truncated term. Displays a warning message if a truncated term, e.g., staph*, produces more than 150 variations.

Note: Truncation turns off automatic term mapping and the automatic explosion of a MeSH term. For example, heart attack* will not map to the MeSH term Myocardial Infarction or include any of the more specific terms, e.g., Myocardial Stunning or Shock Cardiogenic.

Science Citation Index (part of ISI Web of Knowledge)
  • Unlimited Truncation: asterisk (*)
    • Retrieves any number of characters after the word stem or no characters.
    • Example: cancer* retrieves cancer, cancers, cancerous, etc.
  • Wildcard: question mark (?)
    • Represents any single character.
    • Example: cancer? retrieves cancer or cancers.

STAT!Ref

Truncation is accomplished using the following search options found at the bottom of the search screen:

  • Include Synonyms: Results will include matches for words in the search box, as well as synonyms for those words.
    • Example: Searching for heart with Include Synonyms checked will also find cardiac.
  • Include Suffixes: Results will include matches for words in the search box, as well as matches with various suffixes.
    • Example: Searching for disease with Include Suffixes checked will also find diseased and diseases.

TUSK

  • Unlimited Truncation: asterisk (*)
    • Retrieves any number of characters after the word stem