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Douglas Lamont a Department of Child Health, University of
Newcastle, Sir James Spence Institute of Child Health, Royal Victoria
Infirmary, Newcastle upon Tyne NE1 4LP, b Department of Epidemiology and
Public Health, School of Health Care Sciences, Medical School,
University of Newcastle, Newcastle upon Tyne NE1 4HH, c Department of Medicine,
Medical School, University of Newcastle, d Department of Radiology, Royal Victoria Infirmary, Newcastle, e Human Nutrition
Research Centre, University of Newcastle
Correspondence to: D Lamont d.w.lamont{at}ncl.ac.uk
Objective:
To quantify the direct and indirect effects of fetal life, childhood, and adult life on risk of cardiovascular disease at age 49-51 years.
Design:
Follow up study of the "Newcastle thousand families" birth cohort established in 1947.
Participants:
154 men and 193 women who completed a
health and lifestyle questionnaire and attended for clinical
examination between October 1996 and December 1998.
Main outcome measures:
Correlations between mean
intima-media thickness of the carotid artery (carotid intima-media
thickness) and family history, birth weight, and socioeconomic position
around birth; socioeconomic position, growth, illness, and adverse life
events in childhood; and adult socioeconomic position, lifestyle, and biological risk markers. Proportions of variance in carotid
intima-media thickness that were accounted for by each stage of the lifecourse.
Results:
Socioeconomic position at birth and birth weight were negatively associated with carotid intima-media thickness, although only social class at birth in women was a statistically significant covariate independent of adult lifestyle. These early life
variables accounted directly for 2.2% of total variance in men and
2.0% in women. More variation in carotid intima-media thickness was
explained by adult socioeconomic position and lifestyle, which
accounted directly and indirectly for 3.4% of variance in men (95%
confidence interval 0.5% to 6.2%) and 7.6% in women (2.1% to
13.0%). Biological risk markers measured in adulthood independently accounted for a further 9.5% of variance in men (2.4% to 14.2%) and
4.9% in women (1.6% to 7.4%).
Conclusions:
Adult lifestyle and biological risk
markers were the most important determinants of the cardiovascular
health of the study members of the Newcastle thousand families cohort at age 49-51 years. The limited overall effect of early life factors may reflect the postwar birth year of this cohort.
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