Assessment of dementia in elderly schizophrenics with structured rating scales

Philip D Harvey, Michael Davidson, Peter Powchik, Michael Parrella, Leonard White, Richard C. Mohs

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Although a number of elderly institutionalized schizophrenic patients appear to suffer from dementia, little is known about the characteristics of the cognitive impairment or its prevalence in this population. In order to answer these questions it is necessary to first reliably and validly assess dementia in elderly schizophrenic patients. This paper reports the results of a study examining the reliability of assessments of the severity of dementia in schizophrenia using scales designed for other dementing conditions and examining the convergence of ratings of the severity of dementia generated from all available sources of information (patient, caregiver, and chart) versus the chart alone. It was found that the interrater reliability of these ratings was very high. On the other hand ratings generated from the hospital chart alone, without contact with either the patient or caregiver, manifested a systematic bias toward overestimation of the severity of dementia. These results suggest that dimentia assessment in schizophrenia does not require different instrumentation from that used in other conditions but that relying on the medical chart alone would induce a systematic bias in the results.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalSchizophrenia Research
Volume7
Issue number1
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

Fingerprint

Dementia
Caregivers
Schizophrenia
Population

Keywords

  • (Schizophrenia)
  • Dementia
  • Rating scale

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Behavioral Neuroscience
  • Biological Psychiatry
  • Neurology
  • Psychology(all)

Cite this

Assessment of dementia in elderly schizophrenics with structured rating scales. / Harvey, Philip D; Davidson, Michael; Powchik, Peter; Parrella, Michael; White, Leonard; Mohs, Richard C.

In: Schizophrenia Research, Vol. 7, No. 1, 01.01.1992, p. 85-90.

Research output: Contribution to journalArticle

Harvey, Philip D ; Davidson, Michael ; Powchik, Peter ; Parrella, Michael ; White, Leonard ; Mohs, Richard C. / Assessment of dementia in elderly schizophrenics with structured rating scales. In: Schizophrenia Research. 1992 ; Vol. 7, No. 1. pp. 85-90.
@article{3acfac6f7bd5492893286e13a7a976cc,
title = "Assessment of dementia in elderly schizophrenics with structured rating scales",
abstract = "Although a number of elderly institutionalized schizophrenic patients appear to suffer from dementia, little is known about the characteristics of the cognitive impairment or its prevalence in this population. In order to answer these questions it is necessary to first reliably and validly assess dementia in elderly schizophrenic patients. This paper reports the results of a study examining the reliability of assessments of the severity of dementia in schizophrenia using scales designed for other dementing conditions and examining the convergence of ratings of the severity of dementia generated from all available sources of information (patient, caregiver, and chart) versus the chart alone. It was found that the interrater reliability of these ratings was very high. On the other hand ratings generated from the hospital chart alone, without contact with either the patient or caregiver, manifested a systematic bias toward overestimation of the severity of dementia. These results suggest that dimentia assessment in schizophrenia does not require different instrumentation from that used in other conditions but that relying on the medical chart alone would induce a systematic bias in the results.",
keywords = "(Schizophrenia), Dementia, Rating scale",
author = "Harvey, {Philip D} and Michael Davidson and Peter Powchik and Michael Parrella and Leonard White and Mohs, {Richard C.}",
year = "1992",
month = "1",
day = "1",
doi = "10.1016/0920-9964(92)90078-J",
language = "English",
volume = "7",
pages = "85--90",
journal = "Schizophrenia Research",
issn = "0920-9964",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Assessment of dementia in elderly schizophrenics with structured rating scales

AU - Harvey, Philip D

AU - Davidson, Michael

AU - Powchik, Peter

AU - Parrella, Michael

AU - White, Leonard

AU - Mohs, Richard C.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - Although a number of elderly institutionalized schizophrenic patients appear to suffer from dementia, little is known about the characteristics of the cognitive impairment or its prevalence in this population. In order to answer these questions it is necessary to first reliably and validly assess dementia in elderly schizophrenic patients. This paper reports the results of a study examining the reliability of assessments of the severity of dementia in schizophrenia using scales designed for other dementing conditions and examining the convergence of ratings of the severity of dementia generated from all available sources of information (patient, caregiver, and chart) versus the chart alone. It was found that the interrater reliability of these ratings was very high. On the other hand ratings generated from the hospital chart alone, without contact with either the patient or caregiver, manifested a systematic bias toward overestimation of the severity of dementia. These results suggest that dimentia assessment in schizophrenia does not require different instrumentation from that used in other conditions but that relying on the medical chart alone would induce a systematic bias in the results.

AB - Although a number of elderly institutionalized schizophrenic patients appear to suffer from dementia, little is known about the characteristics of the cognitive impairment or its prevalence in this population. In order to answer these questions it is necessary to first reliably and validly assess dementia in elderly schizophrenic patients. This paper reports the results of a study examining the reliability of assessments of the severity of dementia in schizophrenia using scales designed for other dementing conditions and examining the convergence of ratings of the severity of dementia generated from all available sources of information (patient, caregiver, and chart) versus the chart alone. It was found that the interrater reliability of these ratings was very high. On the other hand ratings generated from the hospital chart alone, without contact with either the patient or caregiver, manifested a systematic bias toward overestimation of the severity of dementia. These results suggest that dimentia assessment in schizophrenia does not require different instrumentation from that used in other conditions but that relying on the medical chart alone would induce a systematic bias in the results.

KW - (Schizophrenia)

KW - Dementia

KW - Rating scale

UR - http://www.scopus.com/inward/record.url?scp=0026521916&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026521916&partnerID=8YFLogxK

U2 - 10.1016/0920-9964(92)90078-J

DO - 10.1016/0920-9964(92)90078-J

M3 - Article

VL - 7

SP - 85

EP - 90

JO - Schizophrenia Research

JF - Schizophrenia Research

SN - 0920-9964

IS - 1

ER -