Introduction We assessed tobacco smoke exposure (TSE) levels based on private and
public locations of TSE according to race and ethnicity among US school-aged children …

OBJECTIVE: The implementation of policies that prohibit tobacco smoking in public places
has resulted in a significant reduction in secondhand smoke (SHS) exposure in the US …

This study was carried out to investigate how serum cotinine and hydroxycotinine
concentrations compare and vary by age, gender, race/ethnicity, smoking, and exposure to …

Study objective To determine what factors predict cotinine levels in US children. Design
Cross-sectional study. Subjects Nationally representative sample of 5,653 US children, both …

(1) Background: Trans-3′-hydroxy cotinine (3HC) and cotinine (COT) are tobacco smoke
exposure (TSE) biomarkers and the 3HC/COT ratio is a marker of CYP2A6 activity, an …

Objective In an urban adolescent population, we evaluated sources of exposure to
secondhand smoke exposure (SHS), examined differences in exposure by race/ethnicity …

Introduction Routine biochemical assessment of tobacco smoke exposure could lead to
more effective interventions to reduce or prevent secondhand smoke (SHS)-related disease …

Exposure to environmental tobacco smoke (ETS) is a major cause of morbidity and mortality
among US children. Despite African-American children's having a lower reported exposure …

The objective of this study was to examine long-term trends in serum cotinine (COT)
concentrations, as a measure of secondhand smoke (SHS) exposure, in US nonsmokers …

In this study, we assessed trends of serum cotinine levels over time among US children ages
3–11 years and compared the risk of asthma in groups exposed to passive tobacco smoke …