The Henry Ford Headache Disability Inventory (HDI):
Headache, headaches, headache
HDI can be used to periodically evaluate a patient with headache and can be used to determine the effectiveness of a management strategy over time. It is a 40-item self-assessment scale designed to facilitate the clinician assessment of the patient perception of the functional and emotional aspects of their headaches (Fig. The Henry Ford Headache Disability Inventory (HDI).