title: Electronic cigarette use and indoor air quality in a natural setting.
abstract: Secondhand smoke (SHS) from combustible cigarettes causes numerous diseases. Policies have been developed to prevent SHS exposure from indoor cigarette use to reduce health risks to non-smokers. However, fewer policies have been implemented to deter electronic cigarette (ECIG) use indoors, and limited research has examined the impact of secondhand exposure to ECIG aerosol.
  
  
  
  Indoor air quality was measured at a 2-day ECIG event held in a large room at a hotel. Fine particulate matter (PM) was measured using 2 devices that measured concentrations of PM 2.5 μm aerodynamic diameter or smaller (PM2.5). Measurements were taken before the event, over 2 days when the event was ongoing, and the day after the event. PM2.5measurements were also taken from the restaurant at the hotel hosting the event and a restaurant at a nearby hotel.
  
  
  
  During 6 time points when the event was ongoing, between 59 and 86 active ECIG users were present in the event room (room volume=4023 m3). While the event was ongoing, median PM2.5concentrations in the event room increased from a baseline of 1.92-3.20 μg/m3to concentrations that ranged from 311.68 μg/m3(IQR 253.44-411.84 μg/m3) to 818.88 μg/m3(IQR 760.64-975.04 μg/m3).
  
  
  
  PM2.5concentrations observed at the ECIG event were higher than concentrations reported previously in hookah cafés and bars that allow cigarette smoking. This study indicates that indoor ECIG use exposes non-users to secondhand ECIG aerosol. Regulatory bodies should consider establishing policies that prohibit ECIG use anywhere combustible cigarette use is prohibited.
authors.affiliation: Department of Psychology, Virginia Commonwealth University, Center for the Study of Tobacco Products, Richmond, Virginia, USA.
authors.forename: Eric K
authors.initials: EK
authors.lastname: Soule
authors.affiliation: Department of Psychology, Virginia Commonwealth University, Center for the Study of Tobacco Products, Richmond, Virginia, USA.
authors.forename: Sarah F
authors.initials: SF
authors.lastname: Maloney
authors.affiliation: Department of Psychology, Virginia Commonwealth University, Center for the Study of Tobacco Products, Richmond, Virginia, USA.
authors.forename: Tory R
authors.initials: TR
authors.lastname: Spindle
authors.affiliation: Department of Psychology, Virginia Commonwealth University, Center for the Study of Tobacco Products, Richmond, Virginia, USA.
authors.forename: Alyssa K
authors.initials: AK
authors.lastname: Rudy
authors.affiliation: Department of Psychology, Virginia Commonwealth University, Center for the Study of Tobacco Products, Richmond, Virginia, USA.
authors.forename: Marzena M
authors.initials: MM
authors.lastname: Hiler
authors.affiliation: Department of Psychology, Virginia Commonwealth University, Center for the Study of Tobacco Products, Richmond, Virginia, USA.
authors.forename: Caroline O
authors.initials: CO
authors.lastname: Cobb
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D016902:Air Pollution, Indoor / Q000032:analysis*; D066300:Electronic Nicotine Delivery Systems; D004784:Environmental Monitoring; D006801:Humans; D052638:Particulate Matter / Q000032:analysis; D012147:Restaurants; D012907:Smoking; D013997:Time Factors; D014028:Tobacco Smoke Pollution / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D014028:Tobacco Smoke Pollution
keywords: Electronic nicotine delivery devices; Public policy; Secondhand smoke