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The trajectory of substance use disorder among people formerly in foster care: A survival analysis

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  • Sogol Olamazadeh
  • Ahmed N Hassan
  • Bernard Le Foll

Abstract

Background: Substance use disorder (SUD) represents a significant public health challenge, especially among individuals who have faced early life adversities. Foster care aims to provide a supportive environment for children; however, the relationship between a history of foster care and SUD development remains unclear. Aims: This study aims to examine the likelihood of developing SUD among individuals with a history of foster care, who have used substances during their lifetime, compared to those raised by biological parents. Method: Using data from the National Epidemiologic Survey on Alcohol and Related Conditions-III (NESARC-III), we analyzed the prevalence of social demographics and clinical variables among individuals who have used alcohol, nicotine, or cannabis. We calculated the probabilities of developing SUD for each factor, including exposure to foster care. Various covariates that could impact SUD occurrence were also assessed. The duration from initial substance use to SUD onset was calculated for both groups. Survival analysis curves were generated for each substance to depict the probability of SUD development over time. Results: Our analysis revealed that foster care may act as a protective factor against Cannabis Use Disorder (CUD), with a hazard ratio of 0.25 (95% CI [0.07, 0.88]). No significant associations were found with Alcohol Use Disorder (AUD) or Nicotine Use Disorder (NUD). Both foster and non-foster care groups exhibited higher probabilities of developing NUD compared to the general population. For cannabis users, the probability of developing CUD stabilizes after approximately 10 years. Family history of SUD and clinical predictors such as mood disorders consistently showed significant associations across all substance groups, highlighting their importance in SUD development. Conclusion: Our findings suggest that foster care may offer some protective benefits, particularly against CUD, emphasizing the need for further research into its protective factors and the development of targeted interventions to reduce SUD prevalence in this population.

Suggested Citation

  • Sogol Olamazadeh & Ahmed N Hassan & Bernard Le Foll, 2025. "The trajectory of substance use disorder among people formerly in foster care: A survival analysis," International Journal of Social Psychiatry, , vol. 71(1), pages 159-167, February.
    • Handle: RePEc:sae:socpsy:v:71:y:2025:i:1:p:159-167
    DOI: 10.1177/00207640241287088
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    References listed on IDEAS

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    1. Braciszewski, Jordan M. & Stout, Robert L., 2012. "Substance use among current and former foster youth: A systematic review," Children and Youth Services Review, Elsevier, vol. 34(12), pages 2337-2344.
    2. Barn, Ravinder & Tan, Jo-Pei, 2015. "Foster youth and drug use: Exploring risk and protective factors," Children and Youth Services Review, Elsevier, vol. 56(C), pages 107-115.
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