Skip to main content
. Author manuscript; available in PMC: 2016 Sep 15.
Published in final edited form as: Environ Int. 2015 Dec 12;88:1–8. doi: 10.1016/j.envint.2015.12.003

Fig. 1.

Fig. 1

Category chart for identifying nonusers, recent marijuana users and cigarette smokers. Urinary PAH metabolite concentrations were available in four NHANES cycles: 2005–2006, 2007–2008, 2009–2010 and 2011–2012. Urinary VOC metabolite concentrations were available in two NHANES cycles: 2005–2006 and 2011–2012. Urinary thiocyanate concentration was available in four NHANES cycles: 2005–2006, 2007–2008, 2009–2010 and 2011–2012. Active exclusive cigarette smokers were selected if their sCOT was >10 ng/mL, and they self-reported cigarette smoking within the five days prior to examination, but neither used marijuana nor any other tobacco products.