Time lost due to an attack - a novel patient-reported outcome measure for acute migraine treatments.

Objective: We propose a new outcome measure to assess the efficacy of migraine treatments translating the approach of the Global Burden of Disease studies from a societal to an individual level: Instead of calculating "years lived with disability", we suggest estimating "time lost due to an attack".

Methods: Time lost due to an attack is calculated by multiplying the duration and the degree of impaired functioning during an attack.

Results: Time lost due to an attack, different from other outcome measures, does not just focus on the short-term analgesic effects of treatments, but rather on the improvement of all migraine symptoms and restoration of functioning, also considering therapy-related impairment. Importantly, time lost due to an attack measures the entire time patients are not functioning normally, from onset to complete resolution.

Conclusions: Time lost due to an attack represents a new paradigm to assess migraine burden in single patients for a patient-centered evaluation of both acute and prophylactic treatments.