Affiliation:
1. Scientific Research Center “Arktika” FEB RAS, Magadan, Russia
Abstract
Introduction. This study compared body mass index and arterial blood pressure indices in boys and girls born in Magadan from ages eleven to seventeen. Material and methods. A total of 633 girls and 784 boys aged 11-17 were randomly sampled for the examination which was fulfilled in school physician’s offices and in the summer period of June-July, 2018-2019, in a children’s health camp. Body length (BL, cm) and body mass (BM, kg) were measured, and BMI was calculated for each student. A complex of hard & software unit for noninvasive study of central hemodynamics and the method of volumetric compression oscillometry were used to test subjective cardiohemodynamic performance at rest.
Results. At the age of 14-17, boys tended to be higher in systolic blood pressure (mmHg) and body mass (kg) than girls (p <0.01, p <0.01). Girls, compared with boys, demonstrated higher average variables of heart rate (p <0.05, p <0.01) and diastolic blood pressure (p <0.01, p <0.001) through all age groups. By analysis of individual values obtained for blood pressure and heart rate, 77.2-70.2% of boys and 80.2-75.1% of girls could be referred to those having normal indices. 11.3% of boys and 10.3% of girls exhibited blood pressure variables close to the upper limit of the norm (high norm), and 11.5% and 9.5% of schoolchildren, respectively, were diagnosed with hypertension. Body weight deficiency or overweight were characteristic of 7.2% and 8.7% of girls, and 4.7% and 6.1% of boys, respectively (p <0.05). Quite similar percentage of children could be considered obese: 2.5% of boys and 2.7% of girls.
Conclusion. The most pronounced changes in children’s cardiohemodynamic performance develop in puberty: in girls from ages 11 to 13, in boys at ages 11-14 and 16-17. High incidence of arterial hypertension was observed in both boys and girls at 16-17. A positive correlation between body mass index and blood pressure level existed.
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