The Working Group for Outcome Measures has developed the HALT index, a close derivative of MIDAS¹. It is a simple measure for assessment of headache burden in a patient prior to developing a management plan.

^{1. Stewart WF, Lipton RB, Kolodner K, Sawyer J, Lee C, Liberman JN. Validity of the Migraine Disability Assessment (MIDAS) score in comparison to a diary-based measure in a population sample of migraine sufferers. Pain 2000; 88: 41-52.}

Download the Headache-Attributed Lost Time (HALT) index from the link below