TY - JOUR T1 - Postnatal environmental tobacco smoke exposure is associated with objective markers of atopy in preschool-aged children JF - Evidence Based Medicine JO - Evid Based Med SP - 219 LP - 219 DO - 10.1136/ebmed-2014-110134 VL - 20 IS - 6 AU - Jonathan M. Gaffin Y1 - 2015/12/01 UR - http://ebm.bmj.com/content/20/6/219.abstract N2 - Commentary on: Feleszko W, Ruszczyn´ski M, Jaworska J, et al. Environmental tobacco smoke exposure and risk of allergic sensitisation in children: a systematic review and meta-analysis. Arch Dis Child 2014;99:985–92OpenUrlAbstract/FREE Full Text.Up to two in three children have evidence of exposure to environmental tobacco smoke (ETS) in the developed world,1 mostly from parental smoking. ETS has been highly associated with asthma and allergic rhinitis. The mechanism by which ETS influences allergic conditions is unclear. Limitations have included difficulties parsing prenatal versus postnatal exposure, accurate measures of exposure and unbiased measures of health outcomes. This systematic review and meta-analysis examines the relationship of postnatal exposure to ETS with objective markers of atopy.Observational studies of children aged 0–18 years old for the … ER -