Migraine disability assessment (MIDAS)

The MIDAS was developed to assess headache-related disability with the aim of improving migraine care [13]. It is a self-administered questionnaire designed to quantify headache-related disability over a 3-month period [19]. This questionnaire consists of five questions that focus on time or productivity lost, as well as the limited ability to participate in work or school, household activities and family, and social or leisurely activities. The total MIDAS score can be used to define four grades of migraine-related disability with grade I for “little or no disability” (0–5); grade II for “mild disability” (6–10); grade III for “moderate disability” (11–20); and grade IV for “severe disability” (≥ 21). The MIDAS also includes a migraine severity global question, with subjects’ responses ranging between 0 (no pain at all) to 10 (very severe pain). Two additional questions included in the MIDAS provide the physician with supplementary clinical information about headache frequency and severity/intensity (scale from 0 to 10) of headaches over the previous three months. The MIDAS is a reliable and valid instrument with moderately high test-retest reliability in persons with migraine and correlates to clinical judgment regarding the need for medical care [20].