Objective: To analyze the longitudinal relationship between overweight and hypertension in school children.
Methods: This cohort study enrolled children 6-8 years of age who were then prospectively followed up over a 24 months period with repeat assessments performed at an interval of 11-13 months. Information on participation in physical education classes in school, sports practice outside of school, and economic status were obtained through questionnaires answered by parents/guardians. The measurement of blood pressure, weight, height, and waist circumference was performed during the serial follow-up visits in school.
Results: The proportion of hypertension did not change significantly over the 24 months (7.1% to 8.2%; P = 0.690). However, children with overweight and obesity throughout the period, had a 198% [HR (95% CI) 2.98 (1.40, 6.35)] higher risk of having hypertension diagnosed during follow-up when compared to eutrophic children in the same period.
Conclusion: The development trajectory of overweight and obesity in children aged 6-8 years was associated with hypertension.