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A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation
Inge Kirchberger1, Thomas Finger, Uwe Müller-Bühl
1KORA Myocardial Infarction Registry, Augsburg Hospital, Augsburg, Germany. Inge.Kirchberger@helmholtz-muenchen.de
VASA. Zeitschrift Fur Gefasskrankheiten
|August 24, 2012
Summary
The German Intermittent Claudication Questionnaire (ICQ) is a reliable and valid tool for assessing health-related quality of life in patients with intermittent claudication (IC). This validated German ICQ version shows good feasibility and reliability.
Area of Science:
- Vascular Medicine
- Health Outcomes Research
- Psychometrics
Background:
- The Intermittent Claudication Questionnaire (ICQ) assesses health-related quality of life (HRQOL) in patients with intermittent claudication (IC).
- Validation of translated instruments is crucial for cross-cultural health research.
Purpose of the Study:
- To translate the ICQ into German.
- To evaluate the psychometric properties of the German ICQ version in patients with IC.
Main Methods:
- Forward-backward translation and expert review were employed.
- Feasibility, reliability (Cronbach's alpha, test-retest), and validity (construct, concurrent with SF-36) were assessed in 81 IC patients.
Main Results:
- The German ICQ showed good feasibility (90.1% completion) and a short completion time (6.3 minutes).
- Reliability was satisfactory (Cronbach's alpha = 0.75, ICC = 0.88).
- The questionnaire demonstrated good construct and concurrent validity, correlating significantly with SF-36 scores and walking distance.
Conclusions:
- The German version of the ICQ is a feasible, reliable, and valid instrument for assessing HRQOL in German-speaking IC patients.
- Further studies are recommended to assess responsiveness.
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