Substance use in migrants and refugees

July 20, 2020

It’s been a while since I have shared any epi fun on the blog, and I am very overdue on an update, but I thought I would tide you over with this little research snack – a paper we just published on substance use disorders in migrants and refugees: full text.

Why did we do this study?

Understanding the mental health of migrants and refugees is an important public health issue as over 258 million people are currently living as migrants outside of their birth country. Of these, there are over 25 million refugees which have been forcibly displaced by persecution, war, or violence.

We have seen high rates some mental health problems in migrants, including high rates of post-traumatic stress disorder (PTSD) and psychotic disorders like schizophrenia.

Previous research has also suggested that exposure to traumatic events might be linked to the development of substance use disorders. To explore this further, we looked at the rates of post-traumatic stress disorder (PTSD) in migrants, refugees, and Swedish-born, and looked at the association of PTSD with substance use disorders in these groups.

We also wanted to explore what happened over time to rates of mental health as migrants and refugees lived longer in the host country.

What did we find?

Initially, both refugees and non-refugee migrants had lower risk of substance use disorders (including alcohol use, cannabis use, and poly-drug use) than the Swedish rates, however their rates converged to that of the Swedish-born population after 10 years in Sweden.

We found that rates of PTSD were higher in refugee and non-refugee migrants than the Swedish-born population, but that the association between substance use and PTSD was stronger in the Swedish-born.

What does it mean?

Our study highlights the high burden of substance use problems in the general population, particularly among those with a history of PTSD. Importantly, the convergence of the low rates of substance use disorders in migrants and refugees with the higher rates in the Swedish-born population over time represent an important public health concern.

Read more

The paper is open access, so anyone can read the full study here: [full text] (

Posted on:
July 20, 2020
2 minute read, 425 words
Sweden Epidemiology Substance use Public mental health Migration Migrants & refugees Open access Psychiatric epidemiology Psychosis Social determinants of mental health
New research
See Also:
Neighbourhood migrant density and psychotic disorders