Abstract
BackgroundThe Migraine Disability Assessment (MIDAS) is a brief questionnaire and measures headache-related disability. This study aimed to translate and cross-culturally adapt the original English version of the MIDAS to German and to test its reliability.MethodsThe standardized translation process followed international guidelines. The pre-final version was tested for clarity and comprehensibility by 34 headache sufferers. Test-retest reliability of the final version was quantified by 36 headache patients completing the MIDAS twice with an interval of 48 h. Reliability was determined by intraclass correlation coefficients and internal consistency by Cronbach’s α.ResultsAll steps of the translation process were followed, documented and approved by the developer of the MIDAS. The expert committee discussed in detail the complex phrasing of the questions that refer to one to another, especially exclusion of headache-days from one item to the next. The German version contains more active verb sentences and prefers the perfect to the imperfect tense. The MIDAS scales intraclass correlation coefficients ranged from 0.884 to 0.994 and was 0.991 (95% CI: 0.982–0.995) for the MIDAS total score. Cronbach’s α for the MIDAS as a whole was 0.69 at test and 0.67 at retest.ConclusionsThe translation process was challenged by the comprehensibility of the questionnaire. The German version of the MIDAS is a highly reliable instrument for assessing headache related disability with moderate internal consistency. Provided validity testing of the German MIDAS is successful, it can be recommended for use in clinical practice as well as in research.
Highlights
The Migraine Disability Assessment (MIDAS) is a brief questionnaire and measures headache-related disability
The forward translation resulted in activities which were expressed in the imperfect in German
For MIDAS total score (100 = best) vice versa MIDAS Migraine Disability Assessment, SD Standard Deviation, intraclass correlation coefficient (ICC) Intraclass correlation coefficient, 95% CI: 95% confidence interval for the ICCs
Summary
The Migraine Disability Assessment (MIDAS) is a brief questionnaire and measures headache-related disability. There are several instruments that measure the diseasespecific and health-related disability and its impact on the quality of life of headache sufferers. The Migraine Disability Assessment (MIDAS) questionnaire was originally developed to assess the migraine-related disability of English speaking patients [4]. This tool is one of the most widely used questionnaires and measures impact of headache on. MIDAS questions are not specific for a type of headache, but ask about headache in general This means that the MIDAS can be used for any types of headaches including acute or chronic migraine, tension-type headache, episodic headache, and medication-overuse headache
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