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D J P Barker a Medical Research Council Environmental
Epidemiology Unit, University of Southampton, Southampton General
Hospital, Southampton SO16 6YD, b National Public Health Institute, Department of Epidemiology
and Health Promotion, Mannerheimintie 166, FIN-00300 Helsinki, Finland
Correspondence to: D J P Barker djpb{at}mrc.soton.ac.uk
Objective:
To determine whether men who grew slowly in utero or during infancy are more vulnerable to the later effects of
poor living conditions on coronary heart disease.
What is already known on this topic
What this study adds
Design:
Follow up study of men for whom there were data on body size at birth and growth and social class during childhood, educational level, and social class and income in adult life.
Setting:
Helsinki, Finland.
Participants:
3676 men who were born during 1934-44, attended child welfare clinics in Helsinki, were still resident in
Finland in 1971, and for whom data from the 1980 census were available.
Main outcome measures:
Hospital admission for or death
from coronary heart disease.
Results:
Men who had low social class or low household income in adult life had increased rates of coronary heart disease. The
hazard ratio among men with the lowest annual income (<£8400) was
1.71 (95% confidence interval 1.18 to 2.48) compared with 1.00 in men
with incomes above £15 700. These effects were stronger in men who
were thin at birth (ponderal index <26 kg/m3): hazard
ratio 2.58 (1.45 to 4.60) for men with lowest annual income. Among the
men who were thin at birth the effects of low social class were greater
in those who had accelerated weight gain between ages 1 and 12 years.
Low social class in childhood further increased risk of disease, partly
because it was associated with poor growth during infancy. Low
educational attainment was associated with increased risk, and low
income had no effect once this was taken into account.
Conclusion:
Men who grow slowly in utero remain
biologically different to other men. They are more vulnerable to the
effects of low socioeconomic status and low income on coronary heart disease.
People who grow slowly in utero and during infancy remain biologically
different through their lives
Among men who were thin at birth the risk of coronary heart disease is
further increased if they have poor living standards in adult
life