The development of a semi-structured home interview (CHIF) to directly assess function in cognitively impaired elderly people in two cultures
- 1 March 2006
- journal article
- research article
- Published by Cambridge University Press (CUP) in International Psychogeriatrics
- Vol. 18 (4), 653-666
- https://doi.org/10.1017/S104161020500308X
Abstract
Background: Assessing function is a crucial element in the diagnosis of dementia. This information is usually obtained from key informants. However, reliable informants are not always available.Methods: A 10-item semi-structured home interview (the CHIF, or Clinician Home-based Interview to assess Function) to assess function primarily by measuring instrumental activities of daily living directly was developed and tested for inter-rater reliability and validity as part of the Indianapolis–Ibadan dementia project. The primary validity measurements were correlations between scores on the CHIF and independently gathered scores on the Blessed Dementia Scale (from informants) and the Mini-mental State Examination (MMSE). Sensitivities and specificities of scores on the CHIF and receiver operator characteristic (ROC) curves were constructed with dementia as the dependent variable.Results: Inter-rater reliability for the CHIF was high (Pearson's correlation coefficient 0.99 in Indianapolis and 0.87 in Ibadan). Internal consistency, in both samples, was good (Cronbach's α 0.95 in Indianapolis and 0.83 in Ibadan). Scores on the CHIF correlated well with the Blessed Dementia scores at both sites (−0.71, p < 0.0001 for Indianapolis and −0.56, p < 0.0001 for Ibadan) and with the MMSE (0.75, p < 0.0001 for Indianapolis and 0.44, p < 0.0001 for Ibadan). For all items at both sites, the subjects without dementia performed significantly better than those with dementia. The area under the ROC curve for dementia diagnosis was 0.965 for Indianapolis and 0.925 for Ibadan.Conclusion: The CHIF is a useful instrument to assess function directly in elderly participants in international studies, particularly in the absence of reliable informants.Keywords
This publication has 14 references indexed in Scilit:
- The Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): a reviewInternational Psychogeriatrics, 2004
- Essentials of the Proper Diagnoses of Mild Cognitive Impairment, Dementia, and Major Subtypes of DementiaMayo Clinic Proceedings, 2003
- Incidence of Dementia and Alzheimer Disease in 2 CommunitiesJama-Journal Of The American Medical Association, 2001
- Community screening interview for dementia (CSI ?D?); performance in five disparate study sitesInternational Journal of Geriatric Psychiatry, 2000
- Development of an activities of daily living scale to screen for dementia in an illiterate rural older population in IndiaAge and Ageing, 1999
- The CERAD Neuropsychological Test Battery: norms from a Yoruba-speaking Nigerian sample.1995
- The Consortium to Establish a Registry for Alzheimer's Disease (CERAD). Part I. Clinical and neuropsychological assesment of Alzheimer's diseaseNeurology, 1989
- CAMDEX: A Standardised Instrument for the Diagnosis of Mental Disorder in the Elderly with Special Reference to the Early Detection of DementiaThe British Journal of Psychiatry, 1986
- Clinical diagnosis of Alzheimer's diseaseNeurology, 1984
- The Association Between Quantitative Measures of Dementia and of Senile Change in the Cerebral Grey Matter of Elderly SubjectsThe British Journal of Psychiatry, 1968