Please use this identifier to cite or link to this item:
Title: Validity and reliability of the Portuguese version of the modified Migraine Disability Assessment
Authors: Ferreira, Pedro L. 
Luzeiro, Isabel 
Lopes, Margarida
Jorge, André
Silva, Bruno
Ferreira, Lara
Keywords: Patient reported outcomes; Quality of life, Migraine; mMIDAS-P; Productivity, Disability
Issue Date: 6-Feb-2021
Publisher: Springer Nature
Project: Novartis Farma - research grant 
CEISUC/CIBB is funded by national funds through FCT - Foundation for Science and Technology, I.P., under the Multiannual Financing of R&D Units 2020–2023 
Serial title, monograph or event: BMC Neurology
Volume: 21
Issue: 1
Abstract: Background: Migraine Disability Assessment Scale (MIDAS) is a useful tool to measure headache-related disability. Modified MIDAS with 4-week recall period reduces recall bias and improves accuracy of the results. This study aimed at validating mMIDAS in Portuguese. Methods: Studied population consisted of adult migraine patients attending a headache outpatient clinic. Reliability was assessed by internal consistency and reproducibility in a 3-week test-retest. Content validity was evaluated by two expert panels. Construct validity was tested by comparing mMIDAS-P index in socioeconomic and clinical patient groups and scale unidimensionality was evidenced by factor analysis. Criterion validity was tested using EQ-5D-5L and HADS. Results: Ninety-two patients, 88% female, mean age of 44 years, participated. They had, in average, 9.7 headache days in previous month, pain averaging 7.5/10. About 69.9% were on a migraine prophylactic treatment, and 42.4% had severe disability; 29.4 and 13.0% showed, respectively, moderate/severe anxiety and depression. Content validity showed that mMIDAS-P is simple and clinically useful. It did not show to be determined by patient’s sociodemographic characteristics and it was correlated with depression scale and EQ-5D-5L. Test-retest demonstrated high reproductive reliability and good internal consistency. Conclusion: mMIDAS-P is valid and reliable. We strongly recommend it for clinical and research use.
ISSN: 1471-2377
DOI: 10.1186/s12883-021-02085-z
Rights: openAccess
Appears in Collections:I&D CEISUC - Artigos em Revistas Internacionais

Show full item record


checked on Sep 1, 2023


checked on Sep 2, 2023

Page view(s)

checked on Sep 18, 2023


checked on Sep 18, 2023

Google ScholarTM




This item is licensed under a Creative Commons License Creative Commons