The effect of portable HEPA filter air cleaners on indoor PM2.5 concentrations and second hand tobacco smoke exposure among pregnant women in Ulaanbaatar, Mongolia: The UGAAR randomized controlled trial

Prabjit Barn(Simon Fraser University), Enkhjargal Gombojav(Mongolian National University), Chimedsuren Оchir(Mongolian National University of Medical Sciences), Bayarkhuu Laagan, Bolor Beejin(National Center for Communicable Diseases), Gerel Naidan(Mongolian National University), Buyantushig Boldbaatar(Mongolian National University of Medical Sciences), Jargalsaikhan Galsuren(Mongolian National University), Tsogtbaatar Byambaa(National Center for Communicable Diseases), Craig R. Janes(University of Waterloo), Patricia A. Janssen(University of British Columbia), Bruce P. Lanphear(Simon Fraser University), Tim K. Takaro(Simon Fraser University), Scott A. Venners(Simon Fraser University), Glenys M. Webster(Simon Fraser University), Weiran Yuchi(Simon Fraser University), Christopher D. Palmer(Wadsworth Center), Patrick J. Parsons(Wadsworth Center), Young Man Roh(Korea University), Ryan W. Allen(Simon Fraser University)
The Science of The Total Environment
October 17, 2017
10.1016/j.scitotenv.2017.09.291
Cited by 84Open Access
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Abstract

BACKGROUND: and second hand smoke (SHS) exposures among non-smoking pregnant women in Ulaanbaatar, Mongolia. METHODS: data from centrally-located government monitors. We assessed blood cadmium in late pregnancy. Hair nicotine was quantified in a subset (n=125) to evaluate blood cadmium as a biomarker of SHS exposure. We evaluated air cleaner effectiveness using mixed effects and multiple linear regression models and used stratified models and interaction terms to evaluate potential modifiers of effectiveness. RESULTS: ), respectively. Air cleaner effectiveness was greater when air cleaners were first deployed (40%; 31, 48%) than after approximately five months of use (15%; 0, 27%). Blood cadmium concentrations were 14% (4, 23%) lower among intervention participants, likely due to reduced SHS exposure. CONCLUSIONS: concentrations and SHS exposures in highly polluted settings.

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