Dr. Ashley Merianos, a researcher at the University of Cincinnati and an affiliate member of the Collaborative Consortium on Thirdhand Smoke, recently published a study that finds children who experience hardship or trauma are more likely to live in homes where they are exposed to tobacco smoke. Read the University of Cincinnati’s press release on the study below.
By: Angela Koenig August 7, 2025
A new study reveals a troubling connection between adverse childhood experiences and children’s exposure to tobacco smoke in their homes.
The study is led by University of Cincinnati researcher Dr. Ashley Merianos who specializes in tobacco use and its effects.
Ashley Merianos, PhD, is a professor of human services and tobacco researcher. Photo/UC Marketing + Brand/Andrew Higley.
The research, funded by the National Institutes of Health and now published in Child Protection and Practice, highlights that in the United States school-aged children facing trauma such as parental divorce, community violence or financial hardship are significantly more likely to live in households where tobacco is used — putting their health at further risk.
“Adverse childhood experiences [ACEs] and tobacco smoke exposure are two major independent problems faced by school-aged children in the U.S.,” notes Merianos, a professor in UC’s School of Human Services, within the College of Education, Criminal Justice, and Human Services, and Information Technology.
Merianos has spent over a decade researching the effects of tobacco use (including vaping) on public health — with an emphasis on childhood development.
Key findings:
As the number of ACEs increases, so does the likelihood of children living with people who use tobacco products and the likelihood of their being exposed to harmful smoke.
Both household-related trauma (like parental separation) and community-level adversity (such as witnessing neighborhood violence) correlate with increased exposure.
Even children whose caregivers smoke exclusively outside the home are at risk, due to thirdhand smoke residue on clothing, furniture and surfaces.
“There is a common myth that children living with tobacco smokers who only smoke outside their homes are safe from tobacco smoke exposure and its negative health outcomes,” says Merianos.
Thirdhand Smoke
This study shows that ACEs increase the likelihood that children live with tobacco smokers who smoke only outdoors or are exposed to thirdhand smoke only, she says.
The findings also suggest that ACEs may be a root cause of exposure to thirdhand smoke — or both secondhand and thirdhand smoke — urging health and policy leaders to consider trauma-informed approaches to tobacco prevention and household health interventions.
Merianos is an affiliate member of the Thirdhand Smoke Research Consortium.
Thirdhand smoke exposure is either inhaling, ingesting, or absorbing through the skin the pollutants that are left behind in the environment after tobacco has been smoked. The pollutants can be found on walls, furniture, and decorations.
Merianos recently led a study in collaboration with Cincinnati Children’s on the levels of thirdhand smoke in 80 homes where children reside. That study found nicotine on surfaces in all of the children’s homes and detected the presence of a tobacco-specific carcinogen in nearly half of the homes.
In the current study, the authors call for targeted policies to address both ACEs and environmental tobacco exposure to protect vulnerable populations.
This content was edited for clarity and length.
Click here to read the press release on the University of Cincinnati’s website. Click here to read the research study.
A recent study by Zaman and colleagues at Louisiana State University found that thirdhand vape residue may interfere with lung development at an early age.
A recent study by Zaman and colleagues at Louisiana State University found that thirdhand vape residue may interfere with lung development at an early age.
