Exposure to childhood adversity and adult alcohol, nicotine, and illicit drug use in Germany: a cross-sectional analysis of the German National Cohort (NAKO)

A new study published in the German National Cohort (NAKO) reveals a strong link between exposure to childhood adversity and later substance use in adults. Researchers explored how early-life stress (ELS), including trauma experienced in childhood and adolescence, influences patterns of smoking, alcohol consumption, and illicit drug use.

The study analyzed a large population-based sample of 172,173 adults aged 19-74 years from Germany. Participants completed the Childhood Trauma Screener to gauge their exposure to ELS. Researchers then examined associations between ELS exposure and various substance use behaviors using regression models.

Results showed that higher levels of ELS exposure were linked to increased odds of smoking, heavier drinking for those who consume alcohol, and greater likelihood of lifetime illicit drug use. The strongest associations were observed for opioid and stimulant use. Additionally, dose-response analyses revealed that the more subtypes of ELS a person experienced, the higher the risk for substance use.

The study also applied latent class analysis to categorize participants into distinct substance use profiles. These profiles were associated with varying degrees of ELS exposure, with those experiencing abuse, especially physical and sexual abuse, showing the most pronounced risk. In contrast, neglect had weaker and more variable associations with substance use.

The findings underscore the importance of considering ELS when addressing adult substance use disorders. The study highlights the need for trauma-informed approaches in clinical practice, public health initiatives, and policy-making to help mitigate the long-term consequences of early adversity on individuals' health and well-being.