1.Association between hematocrit levels and arterial hypertension (A cross-sectional study in the Mongolian population)
Munkh-Od O ; Khangai E ; Oyunsuren E
Mongolian Journal of Health Sciences 2026;96(6):48-53
Background:
Arterial hypertension (AH) is a major cardiovascular risk factor worldwide, with a prevalence of 33.1% in Mongolia according to the 2019 STEPS survey. Hematocrit (HCT) is the primary determinant of blood viscosity and has been associated with hypertension in international studies; however, this association has not been sufficiently investigated in the Mongolian population, providing the rationale for the present study.
Aim:
To investigate the association between hematocrit levels and arterial hypertension in the Mongolian population.
Materials and Methods:
From 57,108 records of the 2022–2023 national early detection program organized by the Government of Mongolia, 32,626 participants were selected using proportional stratified random sampling by region. AH was defined per Mongolia’s 2018 Clinical Guidelines for Arterial Hypertension in Adults, with blood pressure measured using an automated sphygmomanometer, as SBP ≥130 mmHg or DBP ≥80 mmHg. Statistical analysis included Mann-Whitney U test, Pearson and Spearman correlation, univariate and multivariate logistic regression, and ROC curve analysis.
Result:
AH was identified in 58.2% of participants (n=18,988). The median HCT in the AH group (43.60%) was significantly higher than in the normotensive group (42.40%, p<0.001). The correlation between HCT and SBP was r=0.152 (p<0.001), with the strongest association observed in the 18–40 age group (r=0.203). ROC curve analysis identified optimal cut-off values of 47.2% for males and 41.8% for females.
Conclusion
1. Hematocrit levels were significantly higher in the hypertensive group compared to the normotensive group and showed a weak positive correlation with both systolic and diastolic blood pressure.
2. Although hematocrit was significantly associated with AH in univariate logistic regression, its independent effect was attenuated in multivariate analysis due to collinearity with hemoglobin. In a separate model with HCT alone adjusted for age, sex, and BMI, the independent association remained statistically significant (aOR=1.260, p<0.001).
3. ROC curve analysis identified sex-specific optimal cut-off values of 47.2% for males and 41.8% for females, highlighting the need to consider sex differences in the Mongolian population. These cut-off values should be regarded as supplementary indicators to be used alongside other cardiovascular risk factors.
2.Hepatic Steatosis Index and Predicted Cardiovascular Risk in a Population-Based Study
Narangerel B ; Batzorig B ; Bayarbold D ; ; Khangai E ; OyunSuren E ; Enkhtur Ya ; Oyuntugs B ; Byambajav Ts
Mongolian Journal of Health Sciences 2026;93(3):64-69
Background:
Metabolic dysfunction–associated steatotic liver disease (MASLD) is a major cause of chronic liver disease and is increasingly linked to cardiovascular disease (CVD), the leading cause of mortality globally.
Aim:
To evaluate individuals participating in early screening using the Hepatic Steatosis Index (HSI) and examine its association with CVD risk levels.
Materials and Methods:
This population-based retrospective cross-sectional study included 47,542 adults aged 40–70 years who participated in a national screening program between 2023 and 2025. Hepatic steatosis was assessed using the Hepatic Steatosis Index (HSI) and categorized as <30 (no steatosis), 30–36 (indeterminate), and >36 (steatosis). Ten-year CVD risk was estimated using laboratory-based WHO cardiovascular disease risk charts for Central Asia. Associations were evaluated using logistic regression and expressed as odds ratios (ORs) with 95% confidence intervals (CIs).
Result:
The mean age of participants was 53.18±8.17 years, and 67.1% (31,886) were women. The prevalence of HSI <30, 30–36, and >36 was 8.9% (4,219), 32.1% (15,271), and 59.0% (28,052), respectively. The distribution of low-, moderate-, and high-risk CVD groups was 48.6% (23,115), 41.3% (19,637), and 10.1% (4,790), respectively. The proportion of individuals with high CVD risk was 5.5% in the HSI <30 group and 10.1% in the HSI >36 group. Compared with the reference group, the odds of high CVD risk were increased in the HSI 30–36 group (OR=1.333; 95% CI: 1.152–1.542) and the HSI >36 group (OR=2.401; 95% CI: 2.094–2.753). These associations remained statistically significant after adjustment for age, sex, systolic blood pressure, waist circumference, physical inactivity, and smoking.
Conclusion
The prevalence of hepatic steatosis in the study population was 59.0%. Individuals with hepatic steatosis had a 1.2-fold higher risk of cardiovascular disease compared with those without steatosis.
3.The effects of mineral content in drinking water on dental caries in children
Batbold G ; ; Enkh-Orchlon ; Khongorzul Ts ; Batzorig B ; Oyunsuren E ; Delgertsetseg J
Mongolian Journal of Health Sciences 2026;93(3):124-131
Background:
Dental caries remains a major public health concern among children and adolescents in Mongolia. The mineral composition of drinking water-particularly fluoride and other essential minerals plays a crucial role in enamel mineralization and caries prevention. Fluoride directly influences the demineralization–remineralization balance of dental enamel and forms a temporary layer of fluid fluorapatite on the enamel surface when exposed to acids, thereby reducing the critical pH for dissolution and increasing acid resistance. In addition, fluoride inhibits the acid-producing metabolism of bacteria such as s.mutans within the biofilm and lowers biofilm acidity, thus slowing the rate of demineralization. Therefore, determining the relationship between population groups and water mineralization is essential for developing effective preventive strategies.
Aim:
To determine the severity and prevalence of dental caries among 5-, 12-, and 15-year-old children living in the 21 provinces of Mongolia and to evaluate the effects of selected minerals in drinking water (Ca, Mg, Cl, F) on dental caries.
Materials and Methods:
The study utilized oral examination data from a total of 421,970 children aged 0-17 years across 21 provinces and 321 soums in Mongolia. Sampling was conducted in Ulaanbaatar city (48.1%) and in all 21 rural provinces. Dental caries was assessed according to WHO criteria, and the effects of minerals in drinking water were analyzed using linear regression.
Result:
The average caries severity of primary teeth in 5-year-old children was 3.0-3.1 dft, which was higher than the caries severity of permanent teeth in 12- and 15-year-olds (1.54DMFdft–1.93 DMFT). Among 5-year-olds, boys had a slightly higher caries severity (3.17±3.52) compared to girls (2.92±3.40), while in the 12- and 15-yearold groups, girls showed higher caries severity than boys. Overall, 5566% of children had at least one carious tooth, and the prevalence among 5-year-olds was 63.5-66.2%. Linear regression analysis showed that fluoride (beta=–0.449, p<0.001) and magnesium (beta=–0.031, p<0.001) in drinking water had a statistically significant protective effect in reducing dental caries in both primary and permanent teeth.
Conclusion
The findings indicate that fluoride (F) and magnesium (Mg) in drinking water are important protective elements against dental caries, whereas calcium (Ca) and chloride (Cl) show no consistent association with caries experience.
4.Assessment of anemia prevalence:clinical severity, and red blood cell morphological types among adults
Enkhmaa B ; Khulan P ; Oyunsuren E ; Odgerel Ts ; Batchimeg N ; Gantulga D ; Uranbaigali E
Diagnosis 2025;115(4):28-35
Introduction:
Anemia is still being a population’s challenging issue regardless of high development of countries around the world. According to a study regarding prevalence and etiology of anemia conducted in 187 countries around the world, the anemia rate is 23 176 per 100 000 population. In accordance with the “5th National Nutrition Survey” study conducted in our country in 2017, one of every five women (21.4%), aged 15-49 years, (16.2%) of reproductive age women and (3.0%) of men are anemic. The current study was conducted due to it is still essential to study and identify the etiology of anemia, determine its prevalence, plan appropriate intervention, and organize future preventive measures, depending on the socio economic conditions, location, diet, and customs of the Mongolians.
Aim:
To determine the prevalence, red blood cell morphology, and severity of anemia among adults. Method: The cross sectional study was conducted during between May 2022 and Sep 2023 and adults aged above 18 years were included. Moreover, we identified anemia cases based on the laboratory test results and determined the anemia severity grade. Statistical analysis was performed by using SPSS software.
Result:
Overall, (6.7%) of participants were anemic: (9.9%) of women and (2.8%) of men. The distribution by severity was: mild anemia (66.7%), moderate anemia (30%), and severe anemia (3.3%). Among women of reproductive age, prevalence was higher, whereas in men, anemia prevalence increased with age. Regionally, the Central region showed the highest prevalence, while other regions varied. Analysis of anemia by red blood cell morphology showed that normocytic anemia accounted for (51.6%), hypochromic anemia 66%, and mean hemoglobin concentration hypochromic (53.6%). Moderate and severe anemia was more common in women than men.
Conclusion
Anemia was detected in (6.7%) of the total study population, (9.9%) of females, and (2.8%) of males were anemic. Of those with anemia, (66.7%) had mild anemia, (30%) had moderate anemia, and (3.3%) had severe anemia. Moderate and severe anemia were more common in females than in males.
5.Study on association between insulin resistance and intermediate risk factors for non-communicable diseases
Khangai E ; Batzorig B ; Bayarbold D ; Enkhtur Ya ; Altaisaikhan Kh ; Oyunsuren E ; Oyuntugs B
Mongolian Journal of Health Sciences 2025;86(2):60-64
Background:
In Mongolia, the prevalence of non-communicable diseases and their intermediate risk factors has continuously
increased in recent years. From results of early detection and prevalence studies of non-communicable diseases in
Mongolia, studies linking intermediate risk factors to insulin resistance are scarce.
Aim:
To identify the prevalence of insulin resistance among the population and study its connection with intermediate
risk factors of non-communicable diseases.
Materials and Methods:
This study was approved by the MNUMS Ethics Committee on February 23, 2024 (2024/3-
02), and was conducted based on the data of participants who took part in the “Population-based Preventive and Early
Detection Screening of Infectious and Non-Infectious Diseases” organized by the Mongolian government from 2022 to
2023. Insulin resistance was identified using the triglyceride-glucose index (TyG), calculated by the formula Ln [fasting
triglycerides (mg/dL) × fasting glucose (mg/dL) / 2]. “Ln” refers to the natural logarithm, based on Euler’s number, approximately
2.71828. TyG levels were classified into low risk (<8.5), medium risk (8.5-9.0), and high risk (>9.0). Defined
intermediate risk factors for non-communicable diseases according to stages of hypertension and diabetes.
Results:
The mean age of participants was 44.3±15.2 years, with 39.2% (n=49,270) male and 41.4% (n=49,749) residing
in urban areas. Among the participants, 59.1% had overweight or obesity, 23.6% had diabetes or impaired fasting glucose,
61.4% had hypertension, and 19.7% had elevated triglycerides. Analyzing by levels of insulin resistance risk, 62.8% of
the population had low risk, 22.5% medium risk, and 14.7% high risk. Comparing systolic blood pressure across levels
of insulin resistance risk showed that even without central obesity or diabetes, as the level of insulin resistance increased,
the level of systolic blood pressure also increased (low risk group: 117.0±11.7, medium risk group: 121.1±10.9, high risk
group: 123.5±16.2 mmHg). Regression analysis of the risk of hypertension by insulin resistance risk level showed that the
risk increased with higher levels of insulin resistance (medium risk group OR=1.35, p<0.0001; high risk group OR=1.63,
p<0.0001).
Conclusion
22.5% of the population is at medium risk and 14.7% at high risk of insulin resistance. The increase in hypertension
risk with higher insulin resistance levels is statistically significant, independent of central obesity and diabetes
stages.
6.The prevalence and severity of anemia among adults
Enkhmaa B ; Khulan P ; Oyunsuren E ; Odgerel TS ; Uranbaigali E
Mongolian Journal of Health Sciences 2025;86(2):97-101
Background:
Anemia is still being a population’s challenging issue regardless of high development of countries around
the world. According to a study regarding prevalence and etiology of anemia conducted in 187 countries around the
world, the anemia rate is 23 176 per 100 000 population. In accordance with the “5th National Nutrition Survey” study
conducted in our country in 2017, one of every five women (21.4%), aged 15-49 years, 16.2% of reproductive age women
and 3.0% of men are anemic. The current study was conducted due to it is still essential to study and identify the etiology
of anemia, determine its prevalence, plan appropriate intervention, and organize future preventive measures, depending
on the socio-economic conditions, location, diet, and customs of the Mongolians.
Aim:
To identify anemia among the adult population, determine the type and severity of anemia.
Materials and Methods:
The cross sectional study was conducted during between May 2022 and Sep 2023 and adults
aged above 18 years were included. Moreover, we identified anemia cases based on the laboratory test results and determined
the anemia severity grade. Statistical analysis was performed by using SPSS software.
Results:
Among the participants, 6.7% of them, 9.9% of females and 2.8% of males are anemic. Prevalence of mild,
moderate and severe anemia is 66.7%, 30% and 3.3%, respectively. While the prevalence of anemia among reproductive
age women is higher, the prevalence of anemia increases with age. The anemia prevalence in Ulaanbaatar region, Western
region, Khangai mountainous region, Central region and Eastern region is 583 (25.6%); 171 (7.5%); 343 (15.1%); 921
(40.4%); and 261 (11.4%), respectively. By regional location, the prevalence is high in the Central region, with varying
prevalence in other regions.
Conclusion
Anemia was detected in 6.7% of the total study population, 9.9% of females, and 2.8% of males were anemic.
Of those with anemia, 66.7% had mild anemia, 30% had moderate anemia, and 3.3% had severe anemia. Moderate
and severe anemia were more common in females than in males.
7.Associations of secondary risk factors of non-communicable diseases
Khangai E ; Batzorig B ; Narantuya D ; Enkhtur Ya ; Oyuntugs B ; Bayarbold Dangaa ; Oyunsuren E
Diagnosis 2024;111(4):51-58
Background:
Obesity and metabolic disorders are significant contributors to hypertension and cardiovascular disease
(CVD). While body mass index (BMI) and waist circumference are known to be associated with systolic blood pressure (SBP), the interplay between adiposity, glucose levels, triglycerides, and SBP is
not fully understood. This study aims to investigate the relationships between BMI, waist circumference, glucose, triglycerides, and SBP in a large population-based cohort.
Methods:
A cross-sectional analysis was conducted on [insert total number] participants with complete data on BMI, waist circumference, blood pressure, glucose, and triglycerides. Descriptive statistics, ANOVA, Pearson correlations, mediation analysis, and multiple regression were used to explore the associations between variables. The moderation effect of glucose on the BMI-SBP relationship
was examined using an interaction term in the regression model.
Results:
The mean age of the study population was 44.3 ± 15.2 years. The mean BMI was 26.7 ± 4.9 kg/m², and 22.7% of participants were classified as obese. Central obesity, measured by waist
circumference, was prevalent in 55.9% of the population. BMI, waist circumference, glucose, and triglycerides were significantly associated with SBP (p < 0.0001). Mediation analysis showed that waist circumference partially mediated the effect of BMI on SBP. The interaction term for BMI and
glucose was significant (β = 0.32, p < 0.05), indicating that glucose levels moderated the relationship between BMI and SBP, with higher glucose levels amplifying the hypertensive effect of BMI.
Conclusion
This study highlights the complex interplay between BMI, waist circumference, glucose, triglycerides, and SBP. Waist circumference partially mediates the effect of BMI on SBP, and glucose levels moderate this relationship, amplifying the impact of obesity on blood pressure.
8.Study of influencing factors of the maternal, infant and placenta weight
Jargalsaikhan B ; Otgonbayar L ; Gandolgor B ; Uurtiintuya B ; Oyunsuren E ; Otgontsetseg B ; Tsolmon G ; Amarjargal B ; Tegshjargal S
Mongolian Medical Sciences 2017;181(3):10-14
Introduction :
In the last years other country scientists told about not only determine infant weights, need to interest
correlation between maternal weight, height and infant weight. In our country few research articles posted
about anthropometry of obstetrics and gynecology. Our study aim is determine maternal weight, infant
weight, placenta weight and assess factors affecting roles on maternal story of “Amgalan” Maternity
Hospital in 2014-2015.
Goal:
The current study aimed at assessing maternal weight, infant weight, placenta weight and evaluating the
effect of factors leading to it.
Materials and Methods:
The data was already collected from “Amgalan” Maternity Hospital using maternal history and record and
it was collected measuring general physical characteristics such as body weight and height, infant weight,
placenta weight and body circumferences. We used retrospective method and collected statistical data
was analyzed using SPSS 21.0 software.
Results:
Of total 964 study participants aged 18-45. The average age of participants was 29.6 ± 5.8 years old and
49.7% (n=479) was working during pregnancy, 45.7% (n=441) hadn’t works, 4.6% (n=44) was student.
The average weight of mothers was 75.4±11.5, weight of infants was 3439.5±456, weight of placenta
was 685±129. The following factors affected maternal and infant weights: lower education, working, early
and late pregnancy complication. Maternal weight had a low direct correlation with infant weight (r=0.267,
p<0.01) and placenta weight (r=0.208, p<0.01). In our study maternal height had a low direct correlation
with infant weight(r=0.173, p<0.01) and infant weight had a moderate direct correlation with placenta
weight (r=0.376, p<0.01).
Conclusions
1. The average maternal weight was 75.4±11.5, infant weight was 3539.5±456, placenta weight was 685±129.
2. The following factors affected maternal and infant weights: lower education, working status, early and late pregnancy complications.
3. Maternal weight had a little direct correlation with infant weight (r=0.267, p<0.01) and placenta
weight (r=0.208, p<0.01).
9.Sexual violence against child and adolescents in Ulaanbaatar
Gou Wang W ; Minjmaa E ; Oyunsuren D ; Khishigsuren Z
Mongolian Medical Sciences 2016;175(1):63-69
Introduction
Violence is defi ned by the WHO as “the intentional use of physical force or power, threatened or actual,
against oneself, another person, or against a group or community, which either results in or has a high
likelihood of resulting in injury, death, psychological harm, maldevelopment, or deprivation”. Violence
can be divided into many types such as physical, psychological, sexual, neglect and economical etc.
Violence against women and child is a manifestation of historically unequal power relations between
men and women or child due to patriarchy in many countries of the world. Child maltreatment or violence
is one of common public health problems in worldwide and psychologically harm in child’s later life.
Objective
To detect types, percent and some infl uencing factors of violence against child and adolescent among
cases, which were involving into forensic psychiatric evaluation procedures.
Materials and Methods
We are analyzed all archive documents of NCMH, 2000-2014 by retrospective methodology on based
ethical approval of NCMH administration (by ordering 2/189 Oct 28, 2015).
Results
Total 1067 cases of violence against child and adolescent were registered in 2000-2014 years and 84.7
percent of those (n=904) were sexual violence cases. Gender difference was defi ning among sexual
violence cases (girls n=885, p<0.000; boys n=19, p<0.000) with statistically signifi cant. Sexual offender
can be act his violence in drunken (OR=2.355; p<0.000; CI 95%; 1.601-3.463) or negative relationship
between family members (OR=3.723; p<0.000; CI 95%-2.356-5.883) are more infl uenced to sexual
violence against child and adolescent.
Conclusion
Sexual violence is more registered among child and adolescent maltreatment cases. Children and
adolescents are more affected into sexual violence likely to have a negative relationship between the
family members or offenders have used alcohol.
10. To describe VARK learning styles of students in Nursing
Sergelentsetseg J ; Battamir U ; Gantsetseg T ; Oyunsuren E
Innovation 2015;9(2):66-68
The term ‘‘learning styles’’ refers to the concept that individuals differ in regard to what mode of instruction or study is most effective for them. There are some types of learning style model in the world and one of them is VARK model which was developed by N.Fleming. Teaching willbecome more effective when determine learning styles of students and teach them suitable way with their learning styles. The main goal of our study is to determine learning styles of nursing students. A descriptiveconfidential questionnaire survey was conducted on 100 students who are learning at Nursing School of MNUMS. They filled VARK questionnaire with 16 question.There are most common learning style was kinesthetic one and it means teaching will be more effective when simulation, close handed and practical sets are used and increased practice hours in the curriculum.
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