Pediatric Medication-overuse Headache and Global Headache Research. A Systematic Review.

Medication-overuse headache (MOH) is a relevant topic of interest but pediatric studies are scarce. Some authors have expressed their opinion regarding geographical differences in the perceived importance of adult MOH between European and North American research. To determine if there is a geographic difference in the research efforts on pediatric MOH; and to study pediatric MOH prevalence of published studies. An analysis of the Global Burden of Disease database focusing on Headache disorders prevalence per region was correlated with the region where research was conducted via PubMed search on pediatric MOH from 2006-2021. Analysis of databases from PubMed, HINARI, and ScienceDirect found 13 studies that fulfilled inclusion criteria to evaluate pediatric MOH prevalence. 6 regions were analyzed North America, Latin America, Europe, Asia, Africa, Oceania. Regions with higher prevalence of headache disorders were North America (28.45%) and Europe (28.54%).  Most pediatric MOH publications were from North America (44.2%) and Europe (37.2%). The prevalence found of pediatric MOH among pediatric headache patients is 4-11%. Prevalence increases to 20-70% among patients having a diagnosis of chronic headache. Higher prevalence was found in patients suffering post traumatic headaches. The perceived importance for pediatric MOH is similar between North America and Europe based on the research published. The prevalence varies greatly between published studies. Relationship between Post-traumatic headache and pediatric MOH prevalence should be further studied.