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© 1994 Oxford University Press

other

Blood Pressure Tracking in Korean Schoolchildren

IL SUH*, CHUNG MO NAM*, EUN SUL LEE{dagger}, IL SOON KIM* and SOON YOUNG LEE*

* Department of Preventive Medicine and Public Health, Yonsei University College of Medicine CPO Box 8044, Seoul, Korea
{dagger} School of Public Health, The University of Texas Health Science Center PO Box 20186, Houston, Texas, 77225 USA

BackgroundMany studies have examined the blood pressure tracking among children and adolescents, but the results have been mixed. This study examined blood pressure tracking in 304 Korean school children following them for 5 years from age 6 to 11.

MethodsIn addition to the examination of relative ranking, in percentile groups, of blood pressure and time-lag correlation analysis, we used the McMahan's tracking index, tau ({tau}), which indicates the proportion of variation attributable to tracking apart from the natural growth (increase) component.

ResultsThere was strong evidence for tracking during the pre-teen years, particularly when it was analysed using McMahan's tracking index. Tau for systolic blood pressure was 0.877 (±0.028) in males and 0.792 (±0.044) in females. For diastolic blood pressure tau was found to be 0.924 (±0.070) in males and 0.762 (±0.075) in females.

ConclusionsThis study supported the existence of blood pressure tracking in children, but data were insufficient to examine the effect of puberty on tracking. The need for further research is emphasized with the aim of incorporating biological and bebvioural factors and targeting preventive intervention.

Received 1 February 1994


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