The Effect of Body Mass Index Changes Between Ages 5 and 14 on Blood Pressure at Age 14

The Effect of Body Mass Index Changes Between Ages 5 and 14 on Blood Pressure at Age 14

<p>oral, cat: 56 ,1732</p><p>THE EFFECT OF BODY MASS INDEX CHANGES BETWEEN AGES 5 AND 14 ON BLOOD PRESSURE AT AGE 14: FINDINGS FROM A BIRTH-COHORT STUDY AA Mamun 1 , DA Lawlor2, M O’Callaghan3, GM Williams1, JM Najman1 1University of Queensland, Queensland, Australia, 2University of Bristol, UK, 3Mater Hospital, Brisbane, Australia</p><p>Background: Weight reduction in clinical populations of severely obese children has been shown to have beneficial effects on blood pressure but little is known about the effect of weight gain among children in the general population. This study compares the mean blood pressure at age 14y with the change in overweight status between age 5y and 14y.Methods: Information from 2,794 children who were born in Brisbane, Australia and who have been followed-up since birth and had body mass index (BMI) and blood pressure measurements at ages 5 and 14y were used. Mean systolic and diastolic blood pressure at age 5y and 14y were the main outcomes and different patterns of change in BMI from age 5 to 14y were the main exposure.Results: Those who changed from being overweight at age 5 to being normal body mass index at age 14 had similar mean blood pressures to those who were normal body mass index at both time points: age and sex adjusted mean difference in systolic blood pressure 1.54 (-0.38,3.45) mmHg and in diastolic blood pressure 0.43(-0.95,1.81) mmHg. By contrast those who were overweight at both ages or who were normal BMI at age 5 and overweight at 14 had higher blood pressure at age 14 than those who were normal at both times. Conclusion: Our findings suggest that programmes, which successfully result in children changing from overweight or obese to normal body mass index status for their age, may have important beneficial effects on subsequent blood pressure.</p>

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