Maltreatment type differences in cortisol stress response trajectories across adolescence

Area of Science:

• Developmental Psychology
• Neuroendocrinology
• Child Psychiatry

Background:

• Childhood maltreatment is a significant public health concern with long-term effects on stress regulation.
• Adolescence is a critical period for neurodevelopment and the maturation of the hypothalamic-pituitary-adrenal (HPA) axis.
• Understanding cortisol stress response trajectories in maltreated youth is crucial for identifying at-risk populations and informing interventions.

Purpose of the Study:

• To examine cortisol stress response trajectories across adolescence in maltreated and comparison youth.
• To investigate differences in peak cortisol activation, reactivity, and recovery slopes based on maltreatment status and type.
• To model age-related changes in cortisol responses in relation to early life adversity.

Main Methods:

• Longitudinal study of 454 youth (ages 9+) recruited in Los Angeles County.
• Assessment of cortisol levels via the Trier Social Stress Test for Children across four waves.
• Statistical modeling to analyze peak activation, reactivity, and recovery trajectories by age and maltreatment status.

Main Results:

• Maltreated adolescents demonstrated blunted cortisol reactivity compared to non-maltreated peers at age 9.
• Youth experiencing sexual and physical abuse showed significantly blunted cortisol reactivity and recovery trajectories.
• Emotional abuse and neglect were associated with different, though still altered, cortisol response patterns.

Conclusions:

• Childhood maltreatment, especially severe forms like sexual and physical abuse, significantly alters adolescent cortisol stress responses.
• These findings highlight the lasting impact of early adversity on HPA axis function and stress regulation during development.
• Identifying specific patterns of HPA axis dysregulation can inform targeted interventions for maltreated youth.