Peer-reviewed article
Ameliorating the biological impacts of childhood adversity: A review of intervention programs
Sukhdip K. Purewal, Vanessa Au, Kadiatou Koita, Debora Lee Oh, Susan Briner et al. ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This literature review examined 40 intervention studies published between 2007 and 2017 that aimed to reverse the biological damage caused by childhood adversity. The interventions targeted biological markers including cortisol levels, brain development, epigenetic regulation, and immune function in children and adolescents who had experienced adversity. Most interventions were effective, particularly when they started early, involved high-quality parenting support, and achieved good engagement from families. The review highlights that programs in institutional, foster care, and community settings can successfully improve children's biological recovery from adversity.
Key points
- 40 randomized controlled trials evaluated interventions addressing biological impacts of childhood adversity, with 20 studies focusing on cortisol outcomes
- Interventions demonstrated overall success in improving or normalizing morning and diurnal cortisol levels
- Programs improved brain development, epigenetic regulation, and other biological outcomes in affected children
- Earlier timing of intervention, high-quality nurturant parenting, and greater engagement were associated with better outcomes
- Studies covered institutional, foster care, and community settings
Limitations
This review focuses only on randomized controlled trials published in English between 2007-2017, so it may not capture all relevant interventions or longer-term follow-up data. The review does not provide detailed information about the specific nature of adversities studied or comparative effectiveness between different types of interventions.
Abstract
Childhood adversity negatively impacts the biological development of children and has been linked to poor health outcomes across the life course. The purpose of this literature review is to explore and evaluate the effectiveness of interventions that have addressed an array of biological markers and physical health outcomes in children and adolescents affected by adversity. PubMed, CINAHL, PsychInfo, Sociological Abstracts databases and additional sources (Cochrane, WHO, NIH trial registries) were searched for English language studies published between January 2007 and September 2017. Articles with a childhood adversity exposure, biological health outcome, and evaluation of intervention using a randomized controlled trial study design were selected. The resulting 40 intervention studies addressed cortisol outcomes (n = 20) and a range of neurological, epigenetic, immune, and other outcomes (n = 22). Across institutional, foster care, and community settings, intervention programs demonstrated success overall for improving or normalizing morning and diurnal cortisol levels, and ameliorating the impacts of adversity on brain development, epigenetic regulation, and additional outcomes in children. Factors such as earlier timing of intervention, high quality and nurturant parenting traits, and greater intervention engagement played a role in intervention success. This study underlines progress and promise in addressing the health impacts of adversity in children. Ongoing research efforts should collect baseline data, improve retention, replicate studies in additional samples and settings, and evaluate additional variables, resilience factors, mediators, and long-term implications of results. Clinicians should integrate lessons from the intervention sciences for preventing and treating the health effects of adversity in children and adolescents.