[A multidimensional questionnaire as a component of preventive geriatric assessment: comparison of self-assessment version with the interview version].

In an earlier study we have shown good internal consistency and test-retest-reliability of a newly developed German-language instrument in the interviewer-administered version. The aim of this study was to test the reliability of a self-administered version compared to the original interviewer-administered version of our newly developed German-language instrument. We recruited a group of 50 over 75-year-old community-dwelling persons in Hamburg, Germany (N = 25) and Berne, Switzerland (N = 25). The questionnaire contains items on: self-perceived health, chronic conditions, basic and instrumental activities of daily living, urinary incontinence, nutrition, recent falls, pain, the social support/network and preventive-care measures. In addition, the Functional Status Questionnaire, the Physical Activity Scale for the Elderly, the Geriatric Oral Health Assessment Index, the Visual Function Questionnaire, the Hearing Handicap Inventory for the Elderly and the Geriatric Depression Scale were administered. Cohen's Kappa (self-administered version compared to the interviewer-administered version) was good to excellent (0.69-1.0) with only three exceptions (physical activity kappa = 0.49, basic activities kappa = 0.54 and oral health kappa = 0.54). For the domains activities of daily living, oral health, visual function and depression the self-administered version detected significantly more problems than the interview. In the future the self-administered version of this assessment instrument can be used for various purposes, e.g. (annual) preventive geriatric assessment for outpatients and other community-dwelling persons and epidemiological studies in older persons.