%0 Journal Article
%T Is Air Pollution a Risk Factor for Low Birth Weight in Ulaanbaatar, Mongolia?
%A Gantuya Dorj
%A Angarmurun Dayan
%A Khuderchuluun Nanjid
%A Undram Lkhagvaa
%A Chimedsuren §°chir
%J Open Access Library Journal
%V 1
%N 8
%P 1-6
%@ 2333-9721
%D 2014
%I Open Access Library
%R 10.4236/oalib.1100885
%X Ulaanbaatar (Mongolia) is one of the most air
polluted capital cities in the world, with ambient sulfide dioxide (SO<sub>2</sub>)
and particulate matter PM<sub>10</sub> and PM<sub>2.5</sub> levels &gt; 23 times
World Health Organization (WHO) standards in winter. Several studies have
examined the effects of air pollution on pregnancy, providing that exposure to
ambient air pollutants is associated with poor birth outcome, such as low birth
weight. Our study goal was to study the associations between air pollution
exposures during pregnancy and low birth weight among all full-term births
(gestational age 37 - 42 weeks) for a 6-year period (January 2008 through
December 31, 2013) in Ulaanbaatar, Mongolia. In the study we recruited 160,676
singletons. We used a logistic regression adjusting for gestational age, parental
education level, parity and infant age. The adjusted relative risk of low birth
weight was 1.06 (95% CI = 1.01 - 1.12) for each inter-quartile increase in NO<sub>2</sub> concentrations. The risk of low birth weight was increased to 1.04 (95% CI = 0.93
- 1.15) for CO, 1.02 (95% CI 0.97 - 1.05) for SO<sub>2</sub> and 1.03 (95% CI 1.01
- 1.08) for PM<sub>10</sub>. Each inter-quartile increase of NO<sub>2</sub> concentration during the first trimester reduced 10.74 gm of birth weight. SO<sub>2</sub>,
CO and PM<sub>10</sub> also decreased birth weight 7.62, 7.49, and 8.72 gm, respectively.
Each inter-quartile increase of pollutants decreases baby weight up to 11 grams.
%K Low Birth Weight
%K Carbon Monoxide
%K Nitrogen Dioxide
%K Sulfur Dioxide
%K Particulate Matter
%K Ulaanbaatar
%K Pollution
%U http://www.oalib.com/paper/3102558