Abstract
BackgroundThe Global Campaign against Headache collects data from children (7–11 years) and adolescents (12–17 years) both to inform health and education policies and to contribute to the Global Burden of Disease (GBD) study. This survey in Mongolia was part of this global enquiry.MethodsFollowing the generic protocol for the global enquiry, this was a schools-based cross-sectional survey. Self-completed structured questionnaires were administered, within classes, in seven schools in four districts of the Capital city and three rural areas of Mongolia, selected to represent the country’s diversities. Headache diagnostic questions were based on ICHD-3 criteria but for the inclusion of undifferentiated headache (UdH).ResultsOf 4515 potential participants, 4266 completed the questionnaire (children 2241 [52.5%], adolescents 2025 [47.5%]; males 2107 [49.4%], females 2159 [50.6%]). Children were therefore slightly over-represented, although overall mean age was 11.3 ± 3.3 years (range: 6–17; median 11). The non-participation proportion was 4.5%. Observed lifetime prevalence of headache was 81.0%. Gender- and age-adjusted 1-year prevalence was 59.4% (migraine: 27.3%; tension-type headache [TTH]: 16.1%; UdH: 6.6%; all headache on ≥15 days/month: 4.2%; probable medication-overuse headache: 0.7%). All headache types except UdH were more prevalent among females than males, and all were more prevalent among adolescents than children, although UdH represented a higher proportion of all headache in children (13.0%) than in adolescents (10.0%). Headache yesterday was reported by 15.9% of the sample, 26.0% of those with headache.ConclusionsAt least in adolescents, headache in Mongolia is no less common than in adults. The clear difference from similar studies in other countries was a lower prevalence of UdH, perhaps a consequence of reporting bias in a non-troublesome headache (mild and short-lasting by definition). This study informs policy in Mongolia and, with no similar study yet from elsewhere in Western Pacific Region, makes an important contribution to the global enquiry.
Highlights
While headache disorders collectively are clearly established as the second highest cause of disability worldwide [1–6], the prevalence estimates on which this is based depend very largely on adult studies, including the many population-based surveys supported by Lifting The Burden (LTB) as part of The Global Campaign against Headache [7–10]
Prior verbal consent was obtained from each participating child or adolescent in accordance with the terms of ethics approval
The population size according to class registers was 4744, but 229 pupils were absent on the day
Summary
While headache disorders collectively are clearly established as the second highest cause of disability worldwide [1–6], the prevalence estimates on which this is based depend very largely on adult studies, including the many population-based surveys supported by Lifting The Burden (LTB) as part of The Global Campaign against Headache [7–10]. LTB, in collaboration with the International Headache Society (IHS), is undertaking a global programme of schools-based studies using a standardised protocol [11] to collect data from children aged 6–11 years and adolescents aged 12– 17 years in countries in all world regions. The Global Campaign against Headache collects data from children (7–11 years) and adolescents (12– 17 years) both to inform health and education policies and to contribute to the Global Burden of Disease (GBD) study. This survey in Mongolia was part of this global enquiry
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