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C P M Leeson a Medical
Research Council Childhood Nutrition Research Centre, Institute of
Child Health, London WC1N 1EH, b Vascular Physiology Unit, Great Ormond Street Hospital for
Children, London WC1N 3JH
Correspondence to: C P M Leeson cpm_leeson{at}hotmail.com
Objectives:
To test the hypothesis that duration of
breast feeding is related to changes in vascular function relevant to the development of cardiovascular disease.
Design:
Population based observational study.
Setting:
Cambridge.
Participants:
331 adults (171 women, 160 men) aged
between 20 and 28 years, born in Cambridge Maternity Hospital.
Main outcome measures:
Distensibility of brachial
artery, type and duration of infant feeding, current lipid profile, and
other cardiovascular risk factors.
Results:
The longer the period of breast feeding the less distensible the artery wall in early adult life, with no sex
differences (regression coefficient =
3.93 µm/month, 95% confidence interval
7.29 to
0.57, P=0.02). However, in those breast fed for less than four months, arterial distensibility was not
significantly reduced compared with an exclusively formula fed group.
The vascular changes observed were not explained by alterations in
plasma cholesterol concentration in adult life.
Conclusions:
Breast feeding in infancy is related to
reduced arterial function 20 years later. These data should not alter current recommendations in favour of breast feeding, which has several
benefits for infant health. Further work is needed, however, to explore
the optimal duration of breast feeding in relation to cardiovascular outcomes.
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