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Shastri SS, et al. Disparities in Secondhand Smoke Exposure in the United States: National Health and Nutrition Examination Survey 2011-2018. JAMA Intern Med. Published online November 23, 2020.

This study was conducted using data from 4 cycles of the National Health and Nutrition Examination Survey (NHANES) from 2011 to 2018. The most recent data (2017-2018) were released in March 2020. Among nonsmokers, individuals having serum cotinine levels of 0.05 to 10 ng/mL were considered to have secondhand smoke exposure (SHSe). The primary outcome of this study is the prevalence of SHSe in nonsmokers in the US population 3 years and older. Multivariable logistic regression identified younger age (odds ratio [OR], 1.88, for 12-19 years, and OR, 2.29, for 3-11 years), non-Hispanic Black race/ethnicity (OR, 2.75), less than high school education (OR, 1.59), and living below the poverty level (OR, 2.61) as risk factors for SHSe in the 2017 to 2018 cycle.
https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/10.1001/jamainternmed.2020.3975

Stephen Hamann