Development of a German telephone version of the IQCODE (The Informant Questionnaire on Cognitive Decline in the Elderly) within a cohort of relatives of ischemic stroke patients

Fortschritte der Neurologie-Psychiatrie
Sabrina EngelhardtPeter Heuschmann

Abstract

To date, no validated long or short telephone version of the German "Informant Questionnaire on Cognitive Decline in the Elderly" (IQCODE) exists for determining cognitive changes over a period of 10 years by interviewing relatives. Sixty relatives of 60 ischemic stroke patients were interviewed both face-to-face and by phone with the 26-item German IQCODE version in randomized order. Inter-method reliability was calculated as between-method agreement and quantified by a weighted kappa with Fleiss-Cohen weights. A short telephone version of the IQCODE was developed with the Variance Inflation Factor (VIF). Its reliability in regard to the 26-item telephone ICQODE version was calculated by Spearman's correlation coefficient. The weighted kappa between the telephone and face-to-face interview was 0.84 (95 % confidence interval: 0.72-0.97). The short version of the IQCODE consists of 10 items. Spearman's Correlation Coefficient in regard to the long and short telephone version of the IQCODE was 0.97 (95 % confidence interval 0.96-0.99). A long and short telephone version of the IQ-CODE for detecting cognitive changes in the elderly within a period of 10 years was developed by interviewing relatives.

References

Aug 2, 2003·International Journal of Geriatric Psychiatry·Wai Kwong TangGabor S Ungvari
Nov 24, 2004·International Psychogeriatrics·Anthony F Jorm
Oct 15, 2008·Dementia and Geriatric Cognitive Disorders·Marcin LeśniakAnna Członkowska
Sep 15, 2009·International Psychogeriatrics·Michael M EhrenspergerAndreas U Monsch
Nov 29, 2012·Geriatrics & Gerontology International·Maria Angélica dos Santos Sanchez, Roberto Alves Lourenço
Sep 5, 2015·Dementia and Geriatric Cognitive Disorders·Thien Kieu Thi PhungGunhild Waldemar

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