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Maternal nutrition, infants and children

The effect of dairy consumption on blood pressure in mid-childhood: CAPS cohort study

Abstract

BACKGROUND/OBJECTIVES:

It has been postulated that a higher dairy consumption may affect blood pressure regulation. The aim of this study was to examine the association between dairy consumption and blood pressure in mid-childhood.

SUBJECTS/METHODS:

Subjects (n=335) were participants of a birth cohort at high risk of asthma with information on diet at 18 months and blood pressure at 8 years. Multivariate analyses were used to assess the association of dairy consumption (serves) and micronutrient intakes (mg). In a subgroup of children (n=201), dietary intake was also measured at approximately 9 years.

RESULTS:

Children in the highest quintile of dairy consumption at 18 months had lower systolic blood pressure (SBP) and diastolic blood pressure (DBP) at 8 years (2.5 mm Hg, P=0.046 and 1.9 mm Hg, P=0.047, respectively) than those in the lowest quintiles. SBP was lowest among children in the highest quintiles of calcium, magnesium and potassium intakes. Significant negative linear trends were observed between SBP and intakes of dairy serves, calcium, magnesium and potassium. Furthermore, SBP and DBP were lowest in the group of children that consumed at least two dairy serves at both 18 months and the follow-up dietary data collection at 9 years, compared with all other children (SBP 98.7 vs 101.0 mm Hg, P=0.07; and DBP 56.5 vs 59.3 mm Hg, P=0.006, respectively).

CONCLUSION:

These results are consistent with a protective effect of dairy consumption in childhood on blood pressure at age 8 years.

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Acknowledgements

We acknowledge the contributions of the CAPS families for participating in the assessments, the CAPS research team for advice and supplying the data for this secondary analysis. Dairy Australia funded this analysis. The University of Sydney Research Foundation and the Asthma Foundation of NSW funded the dietary assessment at the 8-year follow-up. The CAPS was funded by the National Health and Medical Research Council of Australia, Cooperative Research Centre for Asthma, New South Wales Department of Health and the Children's Hospital Westmead. The 18-month dietary data collection was funded by the Commonwealth Department of Health and Aged Care. Analyses including creation of the dietary data entry and analysis program were funded by the Centre for Public Health Nutrition, New South Wales Health Department, and Meat and Livestock Australia. This work was sponsored in part by Dairy Australia

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Correspondence to A M Rangan.

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Contributors: TPG, VLF and AMR developed the study proposal. AMR coded and analysed the data, interpreted the results and wrote the first draft of the manuscript. All authors were involved in the subsequent edits of the manuscript, and read and approved the final manuscript.

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Rangan, A., Flood, V., Denyer, G. et al. The effect of dairy consumption on blood pressure in mid-childhood: CAPS cohort study. Eur J Clin Nutr 66, 652–657 (2012). https://doi.org/10.1038/ejcn.2011.218

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