An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score
An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score
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DOI：
10.1212/wnl.53.5.988
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发表时间：
1999-09-22
期刊：
影响因子：
9.9
通讯作者：
Sawyer, J
中科院分区：
文献类型：
--
作者：
Stewart, WF;Lipton, RB;Sawyer, J
背景资料：偏头痛残疾评估（MIDAS）工具是一个五项问卷，用于测量头痛相关的残疾，并改善医生与患者关于偏头痛功能后果的沟通。目的：在两个国家的偏头痛患者人群样本中检查五个项目和总体MIDAS评分的重测信度和内部一致性，并比较各国之间的一致性。方法：使用临床验证的电话访谈，在美国（巴尔的摩，MD）和英国（默顿和萨顿，萨里）确定偏头痛患者的人群样本。符合条件的个人完成了MIDAS问卷调查两次，平均间隔3周。MIDAS分数来自五个关于工作和家务工作的错过时间的问题（每个问题关于错过的天数和生产力至少降低50%的天数）和错过的非工作活动天数。结果：共有97名来自美国的偏头痛患者和100名来自英国的偏头痛患者完成了两次MIDAS问卷。美国和英国的平均值和中位数项目值以及总体MIDAS评分相似。个别项目的重测斯皮尔曼相关系数在0.46 ~ 0.78之间，美国和英国的项目相关系数没有显著差异。MIDAS评分的重测皮尔逊相关性（即，每个领域的损失天数和有效性降低天数之和）在美国为0.80，在英国为0.83。内部一致性的Cronbach alpha在美国为0.76，在英国为0.73。结论：这是第一个国际人群为基础的研究，以评估偏头痛的残疾相关疾病严重程度评分的可靠性。偏头痛残疾评估评分的可靠性和内部一致性与以前的问卷（头痛影响问卷）相似，但是，偏头痛残疾评估评分需要的问题更少，更容易评分，并提供了三个领域活动损失天数的直观有意义的信息。
Background: The Migraine Disability Assessment (MIDAS) instrument is a five-item questionnaire developed to measure headache-related disability and improve doctor-patient communication about the functional consequences of migraine. Objectives: To examine the test-retest reliability and internal consistency of the five items and of the overall MIDAS score in population-based samples of migraine sufferers in two countries and to compare consistency across countries. Methods: Using a clinically validated telephone interview, population-based samples of migraine-headache sufferers were identified in the United States (Baltimore, MD) and the United Kingdom (Merton and Sutton, Surrey). Eligible individuals completed the MIDAS questionnaire on two occasions an average of 3 weeks apart. The MIDAS score is derived from five questions about missed time from work and household work (one question each about missed days and days with at least 50% reduced productivity) and missed days of nonwork activities. Results: A total of 97 migraine-headache sufferers from the United States and 100 from the United Kingdom completed the MIDAS questionnaire twice. Mean and median item values and overall MIDAS scores were similar between the United States and the United Kingdom. Test-retest Spearman correlations of individual items ranged from 0.46 to 0.78, No significant differences in item-specific correlations were observed between the United States and United Kingdom. The test-retest Pearson correlation of the MIDAS score (i.e., sum of lost days and reduced-effectiveness days in each domain) was 0.80 in the United States and 0.83 in the United Kingdom. The Cronbach alpha, a measure of internal consistency, was 0.76 in the United States and 0.73 in the United Kingdom. Conclusions: This is the first international population-based study to assess the reliability of a disability-related illness severity score for migraine. The reliability and internal consistency of the Migraine Disability Assessment score are similar to that of a previous questionnaire (Headache Impact Questionnaire), However, the Migraine Disability Assessment score requires fewer questions, is easier to score, and provides intuitively meaningful information on lost days of activity in three domains.