Cardiovascular health (CVH) in young adulthood is significantly shaped by growth patterns during infancy and early childhood, alongside socioeconomic factors such as educational attainment. Research from the Consortium of Health-Oriented Research in Transitioning Societies (COHORTS) indicates that these developmental markers serve as critical predictors for long-term heart health in low- and middle-income countries (LMICs).
At Groundwork, our analysis of the COHORTS data confirms that early-life weight gain and birthweight have measurable, often inverse, associations with cardiovascular health status as individuals reach their late twenties and early thirties. Understanding these life-course trajectories is essential for identifying populations at higher risk for metabolic and circulatory conditions later in life.
Birthweight serves as a primary indicator of fetal development, and clinical evidence suggests that higher birthweight in certain LMIC settings is associated with lower odds of achieving ideal cardiovascular health in young adulthood. In the COHORTS study, which analyzed over 4,500 participants across Brazil, Guatemala, the Philippines, and South Africa, researchers found that higher birthweight correlated with poorer cardiovascular outcomes in specific cohorts.
For instance, in Brazil, higher birthweight was associated with an adjusted odds ratio (AOR) of 0.81 (95% CI: 0.71–0.94) for better cardiovascular health, while in the Philippines, the AOR was 0.63 (95% CI: 0.45–0.87). This suggests that in rapidly transitioning economies, the biological programming associated with rapid early growth may predispose individuals to higher body mass index (BMI) or metabolic complications. While these findings might seem counterintuitive to traditional views of birthweight as a purely protective factor, they reflect the complex "thrifty phenotype" hypothesis, where early-life nutritional surplus or rapid catch-up growth can lead to metabolic mismatch in adulthood.
Rapid weight gain during the first two years of life, often measured as conditional relative weight, is a significant determinant of adult BMI and subsequent cardiovascular health. Groundwork’s synthesis of the available data indicates that children who experience accelerated weight gain during this critical window are more likely to exhibit higher BMI levels in their twenties, which directly influences blood pressure and blood glucose regulation.
Data from the COHORTS consortium highlights that conditional relative weight at age two is consistently linked to adult metabolic markers. Because BMI is one of the primary components of the American Heart Association’s Life’s Simple 7 score—the metric used to evaluate CVH—increases in weight during this developmental phase have a cascading effect. When early growth exceeds expected developmental norms, it often results in a higher systemic load on the cardiovascular system by the time an individual reaches the age of 18 to 30.
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More from GroundworkEducational attainment is a powerful socioeconomic determinant of health that often outweighs biological indicators in predicting cardiovascular status in young adults. In the COHORTS analysis, higher levels of schooling were strongly associated with better cardiovascular health outcomes, particularly in Brazil and the Philippines. For every additional year of schooling, the odds of improved CVH increased by 13% in Brazil (AOR = 1.13) and 17% in the Philippines (AOR = 1.17).
This correlation is likely driven by the indirect effects of education on health literacy, access to healthier dietary options, and the ability to navigate complex healthcare systems. Education serves as a proxy for socioeconomic stability, which facilitates better management of blood pressure and smoking cessation, two key components of the Life’s Simple 7 score. Groundwork’s research framework emphasizes that while biological markers like birthweight are significant, the environmental and social advantages gained through education are primary drivers in mitigating the risks associated with early-life growth patterns.
Gender-based differences in cardiovascular health are pronounced among young adults in LMICs, with men consistently showing poorer cardiovascular profiles compared to women. This disparity is largely driven by behavioral factors, specifically higher rates of smoking and less favorable blood pressure management among male cohorts.
In the COHORTS data, the gender gap in CVH was evident across almost all study sites. While biological factors influence metabolic development, the behavioral choices—specifically nicotine consumption—significantly alter the trajectory of heart health in early adulthood. Groundwork’s evidence synthesis suggests that health interventions targeting young adults in these regions must be gender-stratified, focusing on smoking cessation and blood pressure awareness specifically for men, while addressing metabolic health management for both sexes based on early-life growth patterns.
To manage cardiovascular risk effectively, clinicians and policymakers must move toward a life-course approach that integrates early childhood development with adult health surveillance.
- Monitor growth velocity in the first 24 months: Pediatricians should track weight and height gain to identify children at risk for rapid catch-up growth, which may correlate with later metabolic challenges.
- Emphasize educational investment: Public health initiatives should view education as a preventative cardiovascular measure, as higher schooling levels correlate with better health outcomes in young adulthood.
