BACKGROUND The Migraine Disability Assessment (MIDAS) questionnaire is widely used to determine the degree of migraine-related disability of subjects. So far, and to the best of our knowledge, no Spanish version of this tool has been validated. The questionnaire comprises seven items, with the first five constituting the main scale while the sixth and seventh items referring, respectively, to the frequency and intensity of headache. The present study aims to analyze the clinimetric properties of the Spanish version of the MIDAS questionnaire in a population of university students. METHODS We performed a cross-sectional study of validation for this measuring instrument. A total of 153 subjects participated in the study. We analyzed construct validity using factor analysis, test-retest reliability by the Intraclass Correlation Coeficient (ICC), internal consistency, and concurrent validity with respect to the 12-Item Short Form Health Survey (SF-12). RESULTS Factor analysis revealed a two-factor structure. The questionnaire has good reliability for the MIDAS main-scale score ([ICC = 0.81; 95% CI: 0.63-0.90]), excellent reliability for headache frequency (ICC = 0.90; 95%; CI: [0.79-0.95]), and moderately good reliability for headache intensity (ICC = 0.63; 95% CI: [0.34-0.80]). The analysis also yielded good internal consistency results (α Cronbach = 0.797) and a moderate correlation between MIDAS-main scale and the physical component summary of SF-12 (Rho = - 0.326; p <  0.001). CONCLUSIONS The Spanish version of the MIDAS questionnaire is a valid and reliable tool to measure migraine-related disability in university subjects. The two additional items provide information that could help clinicians in making decisions.

中文翻译：

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西班牙版偏头痛残疾评估问卷 (MIDAS) 在患有偏头痛的大学生中的验证。

背景技术偏头痛残疾评估(MIDAS)问卷被广泛用于确定受试者与偏头痛相关的残疾程度。到目前为止，据我们所知，该工具的西班牙语版本尚未得到验证。问卷由七个项目组成，前五个项目构成主量表，第六和第七项目分别指头痛的频率和强度。本研究旨在分析西班牙版 MIDAS 问卷在大学生群体中的临床测量特性。方法 我们对该测量仪器进行了横断面验证研究。共有 153 名受试者参与了这项研究。我们使用因子分析、类内相关系数 (ICC) 的重测信度、内部一致性以及 12 项简短健康调查 (SF-12) 的并发有效性来分析构造效度。结果因子分析揭示了双因子结构。该问卷对 MIDAS 主量表评分具有良好的信度（[ICC = 0.81；95% CI：0.63-0.90]），对头痛频率具有出色的信度（ICC = 0.90；95%；CI：[0.79-0.95]），头痛强度的可靠性中等（ICC = 0.63；95% CI：[0.34-0.80]）。该分析还产生了良好的内部一致性结果（α Cronbach = 0.797），并且 MIDAS 主量表与 SF-12 物理成分摘要之间存在中等相关性（Rho = - 0.326；p < 0.001）。结论 西班牙语版 MIDAS 问卷是衡量大学科目中偏头痛相关残疾的有效且可靠的工具。这两个附加项目提供的信息可以帮助临床医生做出决策。