Air pollution and low birth weight: a historical cohort study from Tehran
M Araban1, N Kariman, S S Tavafian
1Faculty of Nursinq and Midwifery, Shaheed Beheshti University of Medical Science, Tehran, Islamic Republic of Iran.
Abstract:
This historical cohort study was designed to clarify the association between air pollution and low birth weight (LBW) amongst women referred to Tehran hospitals in 2007. In total, 225 eligible pregnant women who lived within 5 km of an air pollution monitoring station during their pregnancy were selected for the study. Data were collected via interview and hospital records. Exposure to each pollutant was estimated for each woman individually throughout her pregnancy and for each trimester. Exposures were modelled as categorical variables using inter-quartile ranges in a logistic regression model. The results showed a significant association between exposure to CO and LBW (OR = 2.08, 95% Cl: 1.70-4.60), particularly during the second trimester (OR = 3.96, Cl: 1.83-12.5). We conclude that exposure to air pollution during pregnancy may be associated with LBW.
Related Concept Videos
Asthma-I: Introduction
Regression Toward the Mean
Chronic Obstructive Pulmonary Disease I: Introduction
Asthma I: Introduction
Environmental Influences on Intelligence
Bias in Epidemiological Studies

