MIDAS and HIT-6 French Translation: Reliability and Correlation Between Tests

Abstract

The aim was to evaluate the test-retest reliability of the French translation of the Migraine Disability Assessment (MIDAS) and Headache Impact Test (HIT)-6 questionnaires as applied to episodic and chronic headaches and to assess the correlation between these two questionnaires. The MIDAS and HIT-6 questionnaires, which assess the degree of migraine-related functional disability, are widely used in headache treatment clinics. The French translation has not been checked for test-retest reliability. MIDAS involves recall, over the previous 3 months, of the number of days with functional disability with regard to work and to home and social life. HIT-6 involves a more subjective and general assessment of headache-related disability over the previous 4 weeks. We expect that there may be greater impact recall bias for chronic headaches than for episodic headaches and considered it important to be able to determine if the reliability of these questionnaires is equally good for these two patient populations. Given that both questionnaires have the same objective, that of assessing headache impact, it was thought useful to determine if their results might show a correlation and if they could thus be used interchangeably. The study was approved by an external ethics committee. The subjects were patients who regularly visit the Clinique de la Migraine de Montréal, which specializes in the treatment of headaches. The MIDAS and HIT-6 questionnaires were completed by the patients during their regular visit. Twelve days later, the same questionnaires were mailed with a prepaid return envelope. Sixty-five patients were required in both the episodic and chronic headache groups, assuming an 80% questionnaire return rate. One hundred and eighty-five patients were enrolled, and 143 completed the study, 75 with episodic headaches and 68 with chronic headaches. The questionnaire return rate was 78.9%. On average, questionnaires were completed a second time 21 days after the first, with a median of 19 days. The Shrout-Fleiss intraclass correlation coefficients for MIDAS and HIT-6 were, respectively, 0.76 and 0.77 for episodic headaches and 0.83 and 0.80 for chronic headaches. The Pearson correlation coefficient between the MIDAS and HIT-6 questionnaires was 0.48 for episodic headaches and 0.58 for chronic headaches at the first compilation and 0.42 and 0.59 at the second compilation. The test-retest intraclass correlation of the French versions for both MIDAS and HIT-6 questionnaires indicates moderate reliability for episodic headache and substantial reliability for chronic headache. The correlation between the MIDAS and HIT-6 questionnaires is weak for episodic headaches, but approaches a level of 'good' for chronic headaches.

Validation of the Headache Impact Test (HIT-6™) across episodic and chronic migraine

“…When using the HIT-6 interpretation guideline to categorize the headache impact severity levels, our findings suggest that CM sufferers were more likely to report substantial or severe headache impact compared to EM or non-migraine sufferers. However, in a French study of the HIT-6 (44) similar HIT-6 scores were observed in chronic (≥15 days; N  = 68) and episodic headache patients (<15 days; N  = 75) who were seen in a migraine clinic (63.1 [time 1] and 62.5 [time 2] for chronic headache patients vs. 64.9 [time 1] and 62.9 [time 2] for episodic headache patients at time 1 and time 2, respectively). Differing findings between studies are likely due to the smaller size and possibly greater homogeneity of the sample in the French study.…”

Reliability and validity of Hindi translation of the migraine disability assessment and headache impact test-6 questionnaires

“…[6] In the French version of MIDAS, the patients had difficulty with item A of MIDAS, and had a tendency to fill a range instead of the exact number of days. [8]…”

A Nursing Intervention Increases Quality of Life and Self‐Efficacy in Migraine: A 1‐Year Prospective Controlled Trial

“…Scores vary between 36 and 78 and are stratified in four severity categories, from no impact to severe impact. This test has a French version that has been validated …”