Key Findings

This is a quick summary of the main discovery 
for each research paper we have published, organized issue by issue. Each key finding is below the article title, with a link to the abstract.

April 2026

Discrimination experiences are associated with same-day and next-day smoking among adults with low socio-economic status trying to quit: A secondary analysis of data from a randomized clinical trial
Experience of discrimination appears to make it harder for adults with socioeconomic disadvantage to quit smoking.
https://onlinelibrary.wiley.com/doi/abs/10.1111/add.70419
Prevalence of opium use and use disorder in the Iranian population: A systematic review and meta-analysis
Despite global shifts to harder opioids, opium use continues to have a very high prevalence among the Iranian general population. 
https://onlinelibrary.wiley.com/doi/abs/10.1111/add.70406
Association between state-level kratom regulations and poison center-reported severe medical outcomes and healthcare use: A United States national analysis
Kratom exposures and severe medical outcomes reported to US poison centers are increasing.
https://onlinelibrary.wiley.com/doi/abs/10.1111/add.70416
High temporal resolution monitoring of illicit drug consumption across England via wastewater analysis
Wastewater analysis revealed widespread and temporally variable illicit drug use across England in 2022.
https://onlinelibrary.wiley.com/doi/abs/10.1111/add.70398
A population-based study exploring racial and gender inequities in polysubstance-related deaths across the United States from 2004 to 2022
In the US from 2004-2022, overdose deaths from polysubstance use escalated sharply across all racial and ethnic groups, with disproportionate increases across non-Hispanic Black and Hispanic individuals.
https://onlinelibrary.wiley.com/doi/abs/10.1111/add.70409
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2026
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