The influence of air pollution exposure on the association between active mobility and short-term health indicators: A systematic review
Oral Presentation A9.2
DOI:
https://doi.org/10.14288/hfjc.v14i3.414Keywords:
Air Pollution, Physical Activity, Short-Term Exposure, Traffic-Related, Active MobilityAbstract
Background: Walking and cycling for transportation, namely active mobility (AM), can improve health through increasing individuals’ daily physical activity levels. People using AM increase their breathing rate, however, inhaling harmful air pollutants (AP) along with necessary oxygen. The interaction of these combined effects is complex physiologically, manifesting as acute changes in health indicators. Purpose: Our study aimed to synthesise the current knowledge on effect modification of AP exposure with AM on short-term health indicators to guide decision-making. Methods: A systematic review was conducted using Medline, Embase, Web of Science and Scopus databases. Searches included a wide range of keywords related to AP and AM to identify original articles published in English or Spanish in peer-reviewed journals until May 2021. Effect modification by AP was examined in studies on healthy adults where an interaction term between AM and AP was included in modelling or that presented stratified analyses by AP levels. Results: 4561 studies were found and 21 were finally included AP main indicators studied include particulate matter, ultrafine particles, and nitrogen oxides. Health indicators studied include a wide range of acute effects grouped into inflammatory, cardiovascular, and respiratory responses. Only four studies tested an interaction term within models. The associations of AM with blood pressure, heart rate variability, neutrophils, and lung function indicators were significantly modified by AP either in- or post-exposure. However, most associations between AM and health indicators were not modified by AP measures at any timepoint. Conclusions: Little evidence of interaction between AP and AM on acute responses was found. Further consideration on study design, interaction testing, and results reporting is needed to advance understanding of this complex relationship to guide future work and decision-making.
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Copyright (c) 2021 Damian Chandia-Poblete, Tom Cole-Hunter, Melissa Haswell, Kristi Heesch
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