Association between parents’ socioeconomic conditions and nutritional status during childhood and the risk of cardiovascular disease in their adult offspring: an intergenerational study in south India

BACKGROUND: Some researchers have suggested that parents' exposure to poor socioeconomic conditions during childhood can increase their offspring's risk of cardiovascular disease, primarily through poor maternal nutrition and growth. However, epidemiological data on this association are limited. In an intergenerational cohort from rural India, we examined the association of parental childhood socioeconomic conditions and stature with offspring's cardiovascular risk, hypothesising an inverse association between the two. METHODS: We analysed data on 3175 adult offspring (aged 18-35 years, 58% men) and their parents from the third wave of the Andhra Pradesh Children and Parents' Study (2010-12). We used multilevel linear regression to estimate the association of parents' Standard of Living Index (SLI, an asset-based measure of socioeconomic conditions) in childhood, height and leg length with subclinical atherosclerosis and cardiovascular risk factors in their offspring. RESULTS: In multivariable models adjusted for offspring's socioeconomic conditions in childhood and adulthood, associations (beta coefficients and 95% CIs) of mother's and father's childhood SLI (per SD) were -0.00 mm (-0.01, 0.01) and 0.01 mm (-0.00, 0.02) for carotid intima media thickness, -0.17 mm Hg (-0.61, 0.27) and -0.30 mm Hg (-0.78, 0.20) for systolic blood pressure, -0.43 mg/dL (-2.00, 1.15) and -1.07 mg/dL (-2.79, 0.65) for total cholesterol and -0.00mU/L (-0.04, 0.03) and 0.01mU/L (-0.03, 0.04) for log fasting insulin. Results were of similar magnitude for parental height and leg length. CONCLUSIONS: Our findings do not support an inverse association between parental childhood socioeconomic conditions or stature and offspring's risk of cardiovascular disease. Intergenerational socioeconomic influences on cardiovascular risk may be of limited public health significance for this setting.