Asthma, Author Interviews, Environmental Risks, Lancet, Pediatrics / 12.04.2019
TRAP: Traffic Related Air Pollution Linked to Millions of Pediatric Asthma Cases Worldwide
MedicalResearch.com Interview with:
Ploy Pattanun Achakulwisut, PhD
Postdoctoral Scientist in Climate change, Air pollution, and Public Health
Milken Institute School of Public Health (Anenberg Group
The George Washington University, D.C
MedicalResearch.com: What is the background for this study?
Response: Dozens of epidemiological studies have found positive and generally statistically significant associations between long-term exposure to traffic-related air pollution (TRAP) and asthma development in children. The evidence is most robust for nitrogen dioxide (NO2), a major component of and commonly used surrogate for the complex TRAP mixture. Recent reviews conducted by the US Environmental Protection Agency and Health Canada concluded that there is “likely a causal relationship” between long-term NO2 exposure and pediatric asthma development.
Using NO2 as a proxy for TRAP, our study provides the first global estimate of the number of new asthma cases among children that are attributable to traffic pollution, using fine spatial-scale global datasets that can resolve within-city and near-roadway NO2 exposures.

Joanne B. Newbury, PhD
ESRC Postdoctoral Fellow
King’s College London
Social, Genetic & Developmental Psychiatry Centre
Institute of Psychiatry, Psychology & Neuroscience
London, United Kingdom
MedicalResearch.com: What is the background for this study?
Response: Urban living is one of the most well-established risk factors for adult psychotic disorders such as schizophrenia. However, less is known about the role of the urban environment in subclinical psychotic experiences in childhood and adolescence, such as hearing voices and extreme paranoia. These early psychotic experiences are a developmental risk factor for adult psychotic disorders and a range of other serious mental health problems such as depression and anxiety.
It is therefore important that we understand what factors might contribute to the development of early psychotic experiences so that we might be able to intervene and prevent their onset and progression.
In a cohort of over 2000 UK-born children (The Environmental Risk Longitudinal Twin Study), we have previously shown that subclinical psychotic experiences are also around twice as common among children and teenagers raised in urban versus rural settings. We have also shown that this appears to be partly explained by social features in urban neighbourhoods such as higher crime levels and lower levels of social cohesion.
However, no studies have examined the potential link between air pollution and psychotic experiences. This is despite air pollution being a major health problem worldwide (particularly in cities), and despite emerging evidence linking air pollution to the brain.
Dr. Gyamfi-Bannerman[/caption]
Cynthia Gyamfi-Bannerman, MD, MSc
Ellen Jacobson Levine and Eugene Jacobson
Professor of Women's Health in Obstetrics and Gynecology
Director, Maternal-Fetal Medicine Fellowship Program
Co-Director, CUMC Preterm Birth Prevention Center
Columbia University
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: In 2016 our group published the findings of the Antenatal Late Preterm Steroids (ALPS) trial in the NEJM. We found that administration of antenatal corticosteroids to women at high risk for delivery from 34-36 weeks decreased breathing problems in their neonates. This treatment had been traditionally only given at less than 34 weeks.
The current paper is a cost analysis of that trial. We found that the treatment was also cost effective. From a cost perspective treatment was both low cost and highly effective (the options are low cost, low effect/low cost/high effect, high cost/low effect, high cost/high effect).
