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Originalia

Die deutschsprachige Version des Illness Perception Questionnaire-Revised

Psychometrische Evaluation an Patienten mit chronisch somatischen Erkrankungen

Published Online:October 26, 2009https://doi.org/10.1026/0943-8149.17.4.158

Abstract

Zusammenfassung. Ziel der Studie war es, die deutschsprachige Version des Illness Perception Questionnaire-Revised (IPQ-R) psychometrisch zu evaluieren. Hierbei wurden die faktorielle Validität, Konstruktvalidität und konkurrente Kriteriumsvalidität bestimmt sowie die interne Konsistenz und Test-Retest-Reliabilität analysiert. Die Mehrzahl der Analysen wurden in einer Querschnittsstudie an N = 817 Patienten aus sechs Rehabilitationskliniken durchgeführt. Die Prüfung der konkurrenten Kriteriumsvalidität erfolgte an einer Teilstichprobe dieser Patienten in Kontrastierung zu einer Stichprobe von N = 58 Akutpatienten. Die Test-Retest-Reliabilität wurde anhand einer Stichprobe von N = 45 Patienten aus zwei Rehabilitationskliniken ermittelt. Die faktorielle Struktur des Original-Fragebogens kann insgesamt bestätigt werden. Die Cronbachs Alpha-Koeffizienten liegen mit Werten zwischen .70 und .87 in einem befriedigend bis guten Bereich, lediglich die Skala „Behandlungskontrolle” weist mit einem α von .58 einen inakzeptablen Wert auf. Das Muster der Korrelationsmatrix ist plausibel. Der Fragebogen diskriminiert zwischen Rehabilitanden und Akutpatienten und weist mit Intraklassenkoeffizienten zwischen .55 und .87 bzw. Pearson-Korrelationskoeffizienten zwischen .56 und .87 eine ausreichende Test-Retest-Reliabilität auf. Die kognitiven Krankheitsrepräsentationen von Rehabilitanden können mit dem deutschsprachigen IPQ-R relativ reliabel und valide gemessen werden. Einige der Ergebnisse weisen jedoch auf Überarbeitungspotenzial des Fragebogens hin.


German version of the Illness Perception Questionnaire-Revised (IPQ-R): Psychometric evaluation in patients with chronic somatic illness

Abstract. The objective of this study was the psychometric evaluation of the German version of the Illness Perception Questionnaire-Revised (IPQ-R). For this, factorial validity, construct validity, and concurrent criterion validity were determined and internal consistency and test-retest reliability were analyzed. The majority of the analyses were carried out in a cross-sectional study of N = 817 patients from six rehabilitation centers. The test for concurrent criterion validity was made on a partial sample of these patients contrasted with a sample of N = 58 acute patients. The test-retest reliability was determined using a sample of N = 45 patients from two rehabilitation centers. In general, the factorial structure of the original questionnaire was confirmed. The Cronbach’s α coefficients are in the satisfactory to good range, with values between .70 and .87, but the scale ”Treatment control” has an unacceptable value of α = .58. The pattern of the correlation matrix is plausible. The questionnaire discriminates between rehabilitation patients and acute patients and shows adequate test-retest reliability, with intraclass coefficients of between .55 and .87 and Pearson correlation coefficients between .56 and .87, respectively. Assessment of the cognitive illness representations of rehabilitation patients using the German IPQ-R is relatively reliable and valid. Some results indicate that the questionnaire could be optimized.

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