Deconstructing Cumulative Risk: Poverty and Aspects of Instability Relate Uniquely to Young Children's Basal Cortisol

Area of Science:

• Child development
• Stress physiology
• Socioeconomic factors

Background:

• Cumulative risk models suggest multiple adversities impact child development.
• Poverty-related instability is a significant stressor for young children.
• Basal cortisol levels serve as a biomarker for physiological stress.

Purpose of the Study:

• To examine the unique associations between specific poverty-related risks and basal cortisol in preschoolers.
• To investigate the relationship between family income and basal cortisol.
• To explore how different aspects of poverty-related instability relate to cortisol dysregulation.

Main Methods:

• Longitudinal study of 288 children aged 3-5 years attending Head Start.
• Parental reports on various poverty risks.
• Collection of salivary cortisol samples at multiple times of day over 6 days.
• Hierarchical linear modeling with piecewise latent growth curves to analyze basal cortisol patterns.

Main Results:

• Family income showed a unique association with basal cortisol.
• Household chaos, neighborhood risk, and residential changes (both attachment-disruptive and non-attachment) were uniquely related to basal cortisol.
• Findings support the equifinality of cumulative risk models, where diverse risks lead to similar outcomes.

Conclusions:

• Multiple poverty-related risks uniquely contribute to cortisol dysregulation in young children.
• Considering the distinct effects of different risks offers utility for understanding neurophysiological stress responses.
• Interventions should address specific poverty-related instabilities to mitigate their impact on child stress regulation.