Reliability and validity of a new measure of severity of delirium.

摘要: The objective of this study was to assess the psychometric properties a new instrument, Delirium Index (DI), measure changes in severity symptoms delirium among patients previously diagnosed with delirium. Subjects were medical inpatients aged 65 and over by Confusion Assessment Method. Interrater reliability DI .78 between research assistants (concordance coefficient) .88 geriatric psychiatrists. Criterion validity, assessed correlation Rating Scale scores (Spearman's coefficient, r), .84. Construct validity using correlations two measures current function for convergent (r = -.60, -.70) before admission discriminant .26,-.42). We conclude that has acceptable levels interrater reliability, criterion construct validity.