Teen Aggression Linked to Accelerated Biological Aging and Lasting Health Risks
A study published by the American Psychological Association indicates that frequent aggressive behavior in adolescence may lead to lasting physical health consequences.
Research found a link between aggressive behavior in early adolescence and faster biological aging, along with a higher body mass index (BMI), by age 30.
According to lead author Joseph Allen, PhD, of the University of Virginia, accelerated aging is associated with an increased risk for future coronary artery disease, diabetes, high blood pressure, inflammation, and early death.
The Study
The study, published in Health Psychology, tracked 121 middle school students (46 male, 75 female) from suburban and urban areas in the Southeastern United States. Participants were followed from age 13 into adulthood.
Researchers collected self-reports of aggression, parent reports of family conflict, and peer reports of relationship behavior. At age 30, biological aging was assessed using blood-based biomarkers.
Measuring Biological Aging
Biological aging was measured using 12 markers, including C-reactive protein, blood sugar, and white blood cell count. An algorithm combined these markers to estimate biological age, which is considered a better predictor of health and mortality than chronological age.
Two validated methods, the Klemera-Doubal approach and PhenoAge, were used. These methods integrate indicators such as blood pressure, inflammation, glucose, cholesterol, and immune function.
Both methods demonstrated that higher levels of aggression in early adolescence predicted more advanced biological age by age 30. This finding held true even after accounting for gender, family income, serious childhood illness, and adolescent body shape.
The study also observed faster biological aging in males and individuals from lower-income families. Further analysis suggested these patterns were connected to relationship difficulties. Specifically, boys experienced more conflict with their fathers, while teens from lower-income families were more likely to exhibit punitive behavior toward peers.
The Crucial Link: Aggression, Relationships, and Aging
Early aggression alone did not predict faster aging unless it led to ongoing relationship problems later in life. Teens with higher aggression levels were more prone to arguments with parents and mistreatment of friends as they matured.
These persistent relationship struggles, rather than early aggression in isolation, were the predictors of accelerated aging.
Researchers state that the study does not definitively prove that teenage aggression directly causes faster aging. Other unmeasured factors may play a role, and the transformation of early behaviors into later relationship problems is considered significant. It is also not yet clear whether aggressive actions, hostile attitudes, or a combination of both contribute to the observed effects.
The findings suggest that early relationship problems could serve as indicators for long-term health risks. They emphasize the importance of promoting healthier relationship development in adolescents to benefit both mental and physical health into adulthood.