ORIGINAL RESEARCH article
Front. Pediatr.
Sec. Children and Health
Prevalence, Main Diagnoses, and Outcomes of Hospital Admissions in Mongolian Children: A National Registry-based Descriptive Analysis
Provisionally accepted
Altanchimeg Sainbayar1
Naranpurev Mendsaikhan1*
Romana Erblich2,3
Ganbold Lundeg1Myagmarsuren Baterdene4
Jens Meier2,3Martin Dünser2,3- 1Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
- 2Kepler Universitatsklinikum GmbH, Linz, Austria
- 3Johannes Kepler Universitat Linz, Linz, Austria
- 4Songinokhairkhan General Hospital, Ulaanbaatar, Mongolia
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Background: No systematic data on pediatric hospital admissions in Mongolia are available. Methods: The Mongolian National Hospital Data registry was screened for pediatric (<18 years) hospital admissions (01.01.2019-31.12.2023) to report the prevalence, main diagnoses, and outcomes of hospital admissions in Mongolian newborns, post-neonatal children und 5 years, and children aged 5-17.99 years. Descriptive methods were used for data analysis. Results: During the study period, 927,223 pediatric hospital admissions were identified translating into a median prevalence of 5,218 (IQR: 4,386-6,098) pediatric hospital admissions per 100,000 population (all ages) per year. This prevalence was highest among post-neonatal children under 5 years (median: 3,780; IQR: 2,491-3,900), followed by children aged 5-17.99 years (median: 1,945; IQR: 1,929-2,071), and newborns (median: 275; IQR: 246-295) over the study period. Neonatal jaundice was the most frequent main diagnosis in newborns. Pneumonia and COVID-19 were most common in both post-neonatal children under 5 years and children aged 5-17.99 years. The median length of hospital stay was 6.7 (IQR: 5.0-9.0) days in newborns, 6.0 (IQR: 5.0-7.0) days in post-neonatal children under 5 years, and 7.0 (IQR: 5.0-8.0) days in children aged 5-17.99 years. The hospital mortality rate was 5.9% in newborns, 0.25% in post-neonatal children under 5 years, and 0.14% in children aged 5-17.99 years. Conclusions: This nationwide, registry-based study found a median prevalence of 5,218 pediatric hospital admissions per 100,000 population (all ages) per year in Mongolia. The majority of pediatric hospital admissions occurred in post-neonatal children under five years. The observation period included the COVID-19 pandemic years.
Keywords: causes of death, hospital admission, Hospitalization, Mongolia, newborns, Under-five children
Received: 27 Oct 2025; Accepted: 12 Jan 2026.
Copyright: © 2026 Sainbayar, Mendsaikhan, Erblich, Lundeg, Baterdene, Meier and Dünser. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Naranpurev Mendsaikhan
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