Fig. 1.

Age distribution, the proportion of acute and prophylactic medications. (a) Age distribution of MOH patients and headache patients without MO. (b) The proportion of acute medication among the 2 groups, as answers of multiple-choice questions. (c) The proportion of prophylactic medication among the 2 groups as answers of multiple-choice questions. Abbreviations: a-CGRP ab, anti-calcitonin gene-related peptide antibody; MOH, medication-overuse headache; NSAIDs, nonsteroidal anti-inflammatory drugs