Feasibility, internal consistency and covariates of TICS-m (telephone interview for cognitive status - modified) in a population-based sample: findings from the KORA-Age study

Authors

  • ME Lacruz,

    1. Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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  • RT Emeny,

    1. Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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  • H Bickel,

    1. Klinik und Poliklinik für Psychiatrie und Psychotherapie, Klinikum rechts der Isar, Technische Universität, Munich, Germany
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  • B Linkohr,

    1. Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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  • KH Ladwig

    Corresponding author
    1. Department of Psychosomatic Medicine and Psychotherapy, Klinikum rechts der Isar, Technische Universität, Munich, Germany
    • Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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Correspondence to: K.H. Ladwig. E-mail: ladwig@helmholtz-muenchen.de

Abstract

Objective

Test the feasibility of the modified telephone interview for cognitive status (TICS-m) as a screening tool to detect cognitive impairment in a population-based sample of older subjects.

Methods

Data were collected from 3,578 participants, age 65–94 years, of the KORA-Age study. We used analysis of covariance to test for significant sex, age and educational differences in raw TICS-m scores. Internal consistency was analysed by assessing Cronbach's alpha. Correction for education years was undertaken, and participants were divided in three subgroups following validated cut-offs. Finally, a logistic regression was performed to determine the impact of sex on cognition subgroups.

Results

Internal consistency of the TICS-m was 0.78. Study participants needed approximately 5.4 min to complete the interview. Lower raw TICS-m scores were associated with male sex, older age and lower education (all p < 0.0001). After correction for education years, 2,851 (79%) had a non-impaired cognitive status (score >31). Male sex was independently associated with having a score equal to or below 27 and 31 (OR = 1.9, 95%CI 1.4–2.5 and OR = 1.5, 95%CI 1.2–1.7, respectively).

Conclusions

The TICS-m is a feasible questionnaire for community-dwelling older adults with normal cognitive function or moderate cognitive impairment. Lower cognitive performance was associated with being a man, being older, and having fewer years of formal education. Copyright © 2012 John Wiley & Sons, Ltd.

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