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Jain, Ram B.
The Science of the total environment, 07/2016, Volume: 557-558Journal Article
Data from National Health and Nutrition Examination Survey for 2005–2012 were used to study the trends and variability in the levels of urinary thiocyanate (u-SCN), perchlorate (u-P8), and nitrate (u-NO3) by gender, race/ethnicity, active smoking, and exposure to environmental tobacco smoke (ETS) at home for those aged 12–19 and ≥20years old. For those aged ≥20years, adjusted levels of u-SCN, u-P8, and u-NO3 (i) were lower for males than females (p<0.01), and (ii) were higher for non-Hispanic white (NHW) than non-Hispanic black (NHB) (p<0.01). Also, for those aged ≥20years NHB had higher adjusted levels than Mexican American (MA) for u-SCN (p<0.01) but NHB had lower adjusted levels than MA for u-P8 (p<0.01) and u-NO3 (p<0.01). For those aged 12–19years, adjusted levels of u-SCN, u-P8, and u-NO3 did not vary by gender (p>0.05), and adjusted levels of u-P8 and u-NO3 for NHB were lower than for NHW (p<0.01) as well as higher for NHB than MA for u-SCN (p<0.01) and lower for NHB than MA (p<0.01) for u-P8 and u-NO3. Among those aged ≥20years, active smoking was associated with higher adjusted levels of u-SCN (p<0.01) in a dose-response manner and active smoking was associated with lower adjusted levels of u-P8 (p<0.01) in a dose-response manner. Exposure to ETS was associated with higher adjusted levels of u-SCN (p=0.02) and lower adjusted levels of u-P8 (p<0.01) among ≥20years old. Adjusted levels of u-P8 decreased over 2005–2012 among both 12–19 (p<0.01) and ≥20years old (p=0.04). There was borderline increase in the adjusted levels of u-NO3 for those aged ≥20years (p=0.05) over 2005–2012. Display omitted •Smokers had higher levels of u-SCN than nonsmokers among ≥20years old.•Smokers had lower levels of u-P8 than nonsmokers among ≥20years old.•Adjusted levels of u-P8 declined over 2005-2012.•Among adults, males had lower levels of u-SCN, u-P8, and u-NO3 than females.•Exposure to ETS was associated with higher levels of u-SCN.
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