HIT-6 = Headache Impact Test, PDI = Pain Disability Index, PHQ-9 = Patient Health Questionnaire, PROMIS = Patient Reported Outcome Measurement Information System
In 2016 and 2017, 347 patients with chronic headaches were seen in the Center for Headache and Facial Pain, with a median interval between initial appointment and follow-up of approximately 181 days (range, 33–501). Of the 307 patients who reported Headache Impact Test scores > 50 at initial evaluation (higher scores indicate greater impairment secondary to headache pain¹), approximately 25% reported improvement. Of the 301 patients who reported initial Pain Disability Index scores ≥ 20 (higher scores indicate greater disability), > 30% reported improvement at follow-up. Clinically meaningful change was defined as ≥ 9 points.² The Patient Reported Outcome Measurement Information System is a self-reported measure of physical and emotional health status reflecting health-related quality of life.³ Of the 217 patients who reported initial quality of life > 0.5 SD below the mean, more than 20% reported improvement. Of the 158 patients who reported initial depressive symptoms above the cutoff of ≥ 10 points for the Patient Health Questionnaire (higher scores indicate greater depression⁴), approximately 30% reported improvement at follow-up.