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Published on: November 21, 2013
Factor analysis supports the evidence of existing hyperactive and hypoactive subtypes of delirium
1Service Universitaire de Psycho Gériatrie, 1011 CHUV Lausanne, Switzerland. vincent.camus@inst.hospvd.ch
Objective:
The aim of this study was to examine whether delirium has specific clinical subtypes.
Method:
One hundred and eighty-three elderly subjects meeting DSM-IIIR criteria for delirium were evaluated using a 19-item symptom check-list assessing different dimensions of delirium symptomatology. Exploratory factor analysis was conducted in order to examine which symptoms clustered.
Results:
Factor analysis confirmed the existence of two different clusters of symptoms: first, symptoms of hyperalert/hyperactive features (agitation, hyper-reactivity, aggressiveness, hallucinations, delusions); and second, symptoms of hypoalert/hypoactive features (decreased reactivity, motor and speech retardation, facial inexpressiveness).
Conclusion:
This preliminary study seems to support the evidence of hypoactive and hyperactive subtypes of delirium, even though their aetiology and prognostic values need to be further examined.
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