Violence exposure in childhood predicted premorbid substance use before first psychosis episode | Research

The takeaway

Among 247 first-episode psychosis patients, childhood exposure to violence and environmental adversity was the strongest predictor of premorbid tobacco, alcohol, and cannabis use, more than interpersonal abuse or neglect.

Early psychosis clinicians, community mental health workers, and childhood adversity researchers.

Environmental violence predicted premorbid substance use; interpersonal abuse did not

What the researchers found

Violence and Environmental Adversity (a factor combining community violence, housing instability, and other environmental stressors) was significantly associated with 5 of 6 substance use variables. Interpersonal Abuse was unassociated with substance use. Neglect and Lack of Connectedness was associated only with lower cannabis use likelihood. Gender stratification showed stronger effects on tobacco use among females.

Why it matters

Understanding what drives substance use before psychosis onset can inform early intervention. The finding that environmental violence (not just personal abuse) is the dominant predictor suggests that community-level interventions could reduce both substance use and psychosis risk.

The numbers in context

247 patients. 86.2% African American, 74.5% male. Three adversity factors: Violence/Environmental Adversity (associated with 5/6 substance variables), Interpersonal Abuse (no associations), Neglect/Lack of Connectedness (associated only with lower cannabis use).

How the study worked

Cross-sectional study of 247 first-episode psychosis patients from 6 inpatient psychiatric units in Atlanta and Washington, D.C. 14 childhood adversity scales reduced to 3 factors via factor analysis. Regression analyses tested associations with premorbid substance use.

What this study cannot tell us

Cross-sectional design. Predominantly African American urban sample may not generalize. Retrospective adversity assessment subject to recall bias. Cannot determine causation.

How to read the evidence

Moderate sample with rigorous factor analysis, but cross-sectional design and retrospective adversity measurement limit conclusions.

When this study was published

2021 study from Atlanta and Washington, D.C.

The bigger picture

Most adversity research in psychosis focuses on individual-level trauma (abuse, neglect). This study shifts attention to environmental and community-level violence as a distinct and more powerful predictor of premorbid substance use, suggesting different intervention points.

Questions still open

Could reducing community violence lower subsequent psychosis rates? Why was neglect associated with lower cannabis use? Do these patterns differ across racial/ethnic groups?

Common questions

What type of childhood adversity predicted substance use before psychosis?

Violence and environmental adversity (community violence, housing instability) was the strongest predictor. Surprisingly, interpersonal abuse (sexual, physical, emotional) was not associated with premorbid substance use.

Did the effects differ by gender?

Yes. The effects of violence exposure on tobacco use were stronger among females, though the overall pattern applied to both genders.

Read the original research

Adversity in childhood/adolescence and premorbid tobacco, alcohol, and cannabis use among first-episode psychosis patients.

Early intervention in psychiatry, 15(5), 1335-1342

View on PubMed ↗Publisher’s paper ↗

Citation

Langlois, Stephanie; Zern, Adria; Kelley, Mary E; Compton, Michael T. (2021). Adversity in childhood/adolescence and premorbid tobacco, alcohol, and cannabis use among first-episode psychosis patients.. Early intervention in psychiatry, 15(5), 1335-1342. https://doi.org/10.1111/eip.13086