Oikonomidi Theodora, Vikelis Michail, Artemiadis Artemios, Chrousos George P, Darviri Christina
Postgraduate Course Stress Management and Health Promotion, School of Medicine, University of Athens, 4 Soranou Ephesiou Str., 11527, Athens, Greece.
Glyfada Headache Clinic, 8 Lazaraki Str., 16675, Glyfada, Greece.
Pharmacoecon Open. 2018 Mar;2(1):77-85. doi: 10.1007/s41669-017-0034-3.
The Migraine Disability Assessment (MIDAS) Questionnaire is a reliable and valid instrument for migraine-related disability. Such a tool is needed to quantify migraine-related disability in the Greek population.
This validation study aims to assess the test-retest reliability, internal consistency, item discriminant and convergent validity of the Greek translation of the MIDAS.
Adults diagnosed with migraine completed the MIDAS Questionnaire on two occasions 3 weeks apart to assess reliability, and completed the RAND-36 to assess validity.
Participants (n = 152) had a median MIDAS score of 24 and mostly severe disability (58% were grade IV). The test-retest reliability analysis (N = 59) revealed excellent reliability for the total score. Internal consistency was α = 0.71 for initial and α = 0.82 for retest completion. For item discriminant validity, the correlations between each question and the total score were significant, with high correlations for questions 2-5 (range 0.67 ≤ r ≤ 0.79; p < 0.01). For convergent validity, there was significant negative correlation between the total score and all RAND-36 subscales except for 'emotional wellbeing'. The negative correlation indicates that patients with a lower degree of disability according to their MIDAS score tended to have better wellbeing. Psychometric properties are comparable with those of other published validation studies of the MIDAS and the original. Findings on question 1 show that missing work/school days may be closely related with increased affect issues.
The Greek version of the MIDAS Questionnaire has good reliability and validity. This study allowed for cross-cultural comparability of research findings.
偏头痛残疾评估（MIDAS）问卷是一种用于评估偏头痛相关残疾的可靠且有效的工具。希腊人群需要这样一种工具来量化偏头痛相关残疾。
本验证研究旨在评估MIDAS希腊语翻译版的重测信度、内部一致性、项目区分效度和收敛效度。
被诊断为偏头痛的成年人在相隔3周的两个时间点完成MIDAS问卷以评估信度，并完成RAND-36问卷以评估效度。
参与者（n = 152）的MIDAS评分中位数为24，且大多为重度残疾（58%为IV级）。重测信度分析（N = 59）显示总分具有出色的信度。初始时内部一致性α = 0.71，重测完成时α = 0.82。对于项目区分效度，每个问题与总分之间的相关性均显著，问题2 - 5的相关性较高（范围为0.67≤r≤0.79；p < 0.01）。对于收敛效度，总分与除“情绪健康”外的所有RAND-36子量表之间存在显著负相关。负相关表明，根据MIDAS评分残疾程度较低的患者往往健康状况更好。心理测量特性与其他已发表的MIDAS验证研究及原版研究相当。问题1的结果表明，缺勤/缺课天数可能与情感问题增加密切相关。
MIDAS问卷希腊语版具有良好的信度和效度。本研究实现了研究结果的跨文化可比性。
