Adverse childhood experiences associated with childhood obesity

Adverse childhood experiences (ACEs) are potentially traumatic events or environmental factors occurring during childhood that can disrupt a child’s sense of safety, stability, and bonding. ACEs include child abuse and maltreatment, family dysfunctions, and exposure to violence outside the family. Individuals impacted by ACEs are at greater risk of developing obesity in adulthood, however, few studies have prospectively measured ACEs and obesity during childhood. Associations with the adoption of obesogenic behaviours during childhood, which directly contribute to obesity are also understudied.

VISION researcher Dr Ladan Hashemi, along with colleagues from the University of Auckland, New Zealand, examined associations between individual and cumulative ACEs, obesity, and obesogenic behaviours during childhood (up to age 8). Using data from eight waves of the Growing Up in New Zealand study—the country’s largest birth cohort study—they developed an index to measure seven ACEs: child physical and psychological abuse, witnessing domestic violence against the mother, parental incarceration, parental substance abuse, parental mental illness, peer bullying, and experiences of ethnic discrimination.  Their research, Associations between specific and cumulative adverse childhood experiences, childhood obesity, and obesogenic behaviours, discovered that:

• ACEs were prevalent among children in New Zealand with almost nine out of ten experiencing at least one ACE. Multiple adverse experiences were also prevalent, with one in three children experiencing at least three traumatic events.
• Higher ACE scores and experience of each specific ACE were significantly more prevalent among those identified as Māori or Pacific, those living in food insecure households or in the most deprived areas.
• Experience of two or more ACEs was associated with higher risk of adopting obesogenic behaviours such as excessive consumption of unhealthy foods and drinks, inadequate consumption of fruits and vegetables, inadequate sleep duration, excessive screen time, and physical inactivity. The risk increased as the number of ACEs increased.   
• Six of nine assessed ACEs were associated with the development of childhood obesity. A dose-response pattern was observed, with obesity risk increasing as the number of ACEs increased.

Exposure to ACEs contributes to the population-level burden of childhood obesity, potentially influencing obesity outcomes through associations with unhealthy, obesogenic behaviours. The findings highlight the importance of a holistic understanding of the determinants of obesity, reinforcing calls for ACEs prevention and necessitating incorporation of ACEs-informed services into obesity reduction initiatives.

Recommendations

• Childhood obesity reduction efforts may benefit from considering the role of ACEs. Understanding and addressing the social determinants of obesity, such as family and social environments, may be important in the context of traditional behavioural change interventions targeting nutrition, sleep, screen time, and physical activity
• Interventions that reduce children’s exposure to violence could help reduce levels of obesity and associated ACEs
• Violence reduction and family support should feature in the government’s Tackling Obesity strategy

To download the paper: Full article: Associations between specific and cumulative adverse childhood experiences, childhood obesity, and obesogenic behaviours

To cite: Hashemi, L., Ghasemi, M., Mellar, B., Gulliver, P., Milne, B., Langridge, F., … Swinburn, B. (2025). Associations between specific and cumulative adverse childhood experiences, childhood obesity, and obesogenic behaviours. European Journal of Psychotraumatology, 16(1). https://doi.org/10.1080/20008066.2025.2451480

Or for further information, please contact Ladan at ladan.hashemi@city.ac.uk

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