The strain of care for Delirium Index: A new instrument to assess nurses' strain in caring for patients with delirium

Koen Milisen, Saskia Cremers, Marquis D. Foreman, Ellen Vandevelde, Marc Haspeslagh, Sabina De Geest, Ivo L Abraham

Research output: Contribution to journalArticle

22 Scopus citations


This study evaluated content validity, internal consistency and construct validity of the Strain of Care for Delirium Index (SCDI), a newly constructed instrument to measure the strain nurses experience in caring for patients with delirium. Content validity, evaluated by eight experts, reduced the initial pool of items from 38 to 28. Using a convenience sample of 190 nurses, Cronbach's α for the 28-item version was 0.88. Using non-linear principal components analysis another eight items were eliminated and a four-factor structure was identified. The proportion of variance explained by the remaining 20 items was 61.51%. Preliminary psychometric evaluation of the SCDI supported content validity, internal consistency and construct validity; however additional psychometric evaluation is warranted.

Original languageEnglish (US)
Pages (from-to)775-783
Number of pages9
JournalInternational Journal of Nursing Studies
Issue number7
Publication statusPublished - Sep 2004
Externally publishedYes



  • Assessment
  • Delirium
  • Instrument validation
  • Strain of care

ASJC Scopus subject areas

  • Medicine(all)
  • Nursing(all)
  • Health(social science)

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