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Elevated Blood Pressure among Rural South African Children in Thohoyandou, South Africa
Daniel Goon1, Lateef Amusa, Dorothy Mhlongo
1Centre for Biokinetics, Recreation and Sport Science, University of Venda, Thohoyandou, South Africa.
Insights
Blood pressure increases with age in rural South African children. This study found elevated blood pressure and its correlation with body mass index (BMI) in children aged 7-13 years.
Area of Science:
- Pediatric Health
- Cardiovascular Epidemiology
- Anthropometry
Background:
- Limited data exists on blood pressure profiles of rural South African children.
- Previous research primarily focused on urban populations.
Purpose of the Study:
- To determine blood pressure profiles in rural South African children in Thohoyandou.
- To investigate the relationship between body mass index (BMI) and blood pressure.
Main Methods:
- A study of 296 children aged 7-13 years.
- Blood pressure measured thrice using validated electronic devices.
- Overweight defined by BMI for gender and age; hypertension by BP ≥ 90th percentile.
Main Results:
- Overweight prevalence was 4.7% in girls and 3.9% in boys.
- Systolic and diastolic blood pressures increased with age in both sexes.
- Hypertension incidence was low (0.4% in boys, 0.2% in girls) but correlated with age, BMI, and height.
Conclusions:
- Elevated blood pressure is present in this rural South African pediatric population.
- Blood pressure positively correlates with age, body weight, height, and BMI in children.
- Findings highlight the importance of monitoring BP and BMI in rural children.
Background:
Whilst there seem to be available data on blood pressure profiles of South African children, especially in urban areas, few data exist on rural children. The aims of this study were to determine the blood pressure profiles of rural South African children residing in Thohoyandou; and to examine the relationship between body mass index and blood pressure among the children.
Methods:
The study involved 296 (134 boys and 135 girls) children aged 7-13 years. Body weight and height were measured using standard procedures. Overweight was defined by body mass index (BMI) for gender and age. Blood pressure was monitored in each child thrice using validated electronic devices (Omron 7051T). Hypertension was determined as the average of three separate blood pressure readings where the systolic or diastolic blood pressure was ≥ 90th percentile for age and sex.
Results:
Overweight among the girls (4.7%) was higher compared with the boys (3.9%). Both systolic and diastolic pressures (SBP and DBP) increase with age in both sexes. The proportion of children with > 90th percentile occur at only ages 12 and 13 years. The incidence of hypertension (SBP > 90th percentile) was 0.4% and 0.2% in boys and girls, respectively. The SBP and DBP pressures significantly (P<0.05) correlate with age; body mass, height and BMI.
Conclusion:
Elevated blood pressure is prevalent among rural South African children residing in this region. Also, blood pressure increased with age in both boys and girls, and this positively correlated with age, body weight, height and BMI.
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