The study reported that the NNK levels on surfaces and vacuumed dust were similar, which Merianos says indicates that surfaces and dust can be similar reservoirs and sources of thirdhand smoke exposure for children.

“This is critically important and concerning, since NNK is considered the most potent carcinogen for tobacco-induced cancers,” says Merianos, an associate professor in UC’s School of Human Services.

Additional findings include:

• Children living in lower-income households had higher levels of NNK and nicotine found on home surfaces. 
• Children living in homes that did not ban indoor smoking had higher levels of NNK and nicotine found on surfaces.

Merianos says that NNK and nicotine were still detected in homes with voluntary indoor smoking bans, which highlights the persistence of thirdhand smoke pollutants on surfaces in children's homes.

“This research highlights that home smoking bans do not fully protect children and their families from the dangers of tobacco,” she adds. 

Merianos is a prolific researcher and has extensive training and experience in the epidemiology and prevention of substance use with an emphasis on tobacco, as well as quantitative statistical methods and clinical and translational research in the pediatric health care setting. 

She is also a research affiliate member of Cincinnati Children’s Hospital Medical Center, the Thirdhand Smoke Research Consortium and the American Academy of Pediatrics Tobacco Consortium.

Featured image at top of Ashley Merianos. Photo/Andrew Higley/UC Marketing + Brand.