PMID- 36705578 OWN - NLM STAT- MEDLINE DCOM- 20230208 LR - 20240210 IS - 1520-5851 (Electronic) IS - 0013-936X (Print) IS - 0013-936X (Linking) VI - 57 IP - 5 DP - 2023 Feb 7 TI - Distinguishing Exposure to Secondhand and Thirdhand Tobacco Smoke among U.S. Children Using Machine Learning: NHANES 2013-2016. PG - 2042-2053 LID - 10.1021/acs.est.2c08121 [doi] AB - While the thirdhand smoke (THS) residue from tobacco smoke has been recognized as a distinct public health hazard, there are currently no gold standard biomarkers to differentiate THS from secondhand smoke (SHS) exposure. This study used machine learning algorithms to assess which combinations of biomarkers and reported tobacco smoke exposure measures best differentiate children into three groups: no/minimal tobacco smoke exposure (NEG); predominant THS exposure (TEG); and mixed SHS and THS exposure (MEG). Participants were 4485 nonsmoking 3-17-year-olds from the National Health and Nutrition Examination Survey 2013-2016. We fitted and tested random forest models, and the majority (76%) of children were classified in NEG, 16% were classified in TEG, and 8% were classified in MEG. The final classification model based on reported exposure, biomarker, and biomarker ratio variables had a prediction accuracy of 95%. This final model had prediction accuracies of 100% for NEG, 88% for TEG, followed by 71% for MEG. The most important predictors were the reported number of household smokers, serum cotinine, serum hydroxycotinine, and urinary 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL). In the absence of validated biomarkers specific to THS, comprehensive biomarker and questionnaire data for tobacco smoke exposure can distinguish children exposed to SHS and THS with high accuracy. FAU - Merianos, Ashley L AU - Merianos AL AUID- ORCID: 0000-0002-5640-7227 AD - School of Human Services, University of Cincinnati, P.O. Box 210068, Cincinnati, Ohio 45221, United States. FAU - Mahabee-Gittens, E Melinda AU - Mahabee-Gittens EM AUID- ORCID: 0000-0002-3893-885X AD - Division of Emergency Medicine, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, Ohio 45229, United States. FAU - Stone, Timothy M AU - Stone TM AD - Division of Biostatistics and Bioinformatics, Department of Environmental and Public Health Sciences, College of Medicine, University of Cincinnati, Kettering Lab Building, 160 Panzeca Way, Cincinnati, Ohio 45267-0056, United States. FAU - Jandarov, Roman A AU - Jandarov RA AD - Division of Biostatistics and Bioinformatics, Department of Environmental and Public Health Sciences, College of Medicine, University of Cincinnati, Kettering Lab Building, 160 Panzeca Way, Cincinnati, Ohio 45267-0056, United States. FAU - Wang, Lanqing AU - Wang L AD - Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Atlanta, Georgia 30341, United States. FAU - Bhandari, Deepak AU - Bhandari D AUID- ORCID: 0000-0001-6059-2739 AD - Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Atlanta, Georgia 30341, United States. FAU - Blount, Benjamin C AU - Blount BC AD - Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Atlanta, Georgia 30341, United States. FAU - Matt, Georg E AU - Matt GE AD - Department of Psychology, College of Sciences, San Diego State University, 9245 Sky Park Court, Suite 225, San Diego, California 92123, United States. LA - eng GR - K01 DA044313/DA/NIDA NIH HHS/United States GR - R01 ES027815/ES/NIEHS NIH HHS/United States GR - R01 ES030743/ES/NIEHS NIH HHS/United States GR - R21 ES032161/ES/NIEHS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20230127 PL - United States TA - Environ Sci Technol JT - Environmental science & technology JID - 0213155 RN - 0 (Tobacco Smoke Pollution) RN - K5161X06LL (Cotinine) RN - 0 (Biomarkers) RN - 8PJ61P6TS3 (1-Butanol) SB - IM MH - Humans MH - Child MH - *Tobacco Smoke Pollution/analysis MH - Nutrition Surveys MH - Cotinine MH - Biomarkers MH - 1-Butanol MH - Algorithms MH - Nicotiana/chemistry PMC - PMC10230650 MID - NIHMS1894782 OTO - NOTNLM OT - National Health and Nutrition Examination Survey OT - biomarkers OT - child OT - machine learning OT - thirdhand smoke OT - tobacco smoke exposure COIS- The authors declare no competing financial interest. EDAT- 2023/01/28 06:00 MHDA- 2023/02/09 06:00 PMCR- 2024/02/07 CRDT- 2023/01/27 10:06 PHST- 2023/01/28 06:00 [pubmed] PHST- 2023/02/09 06:00 [medline] PHST- 2023/01/27 10:06 [entrez] PHST- 2024/02/07 00:00 [pmc-release] AID - 10.1021/acs.est.2c08121 [doi] PST - ppublish SO - Environ Sci Technol. 2023 Feb 7;57(5):2042-2053. doi: 10.1021/acs.est.2c08121. Epub 2023 Jan 27.