A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Associations between personal exposures and ambient concentrations of nitrogen dioxide: A quantitative research synthesis
Abstract Although positive associations between ambient NO2 concentrations and personal exposures have generally been found by exposure studies, the strength of the associations varied among studies. Differences in results could be related to differences in study design and in exposure factors. However, the effects of study design, exposure factors, and sampling and measurement errors on the strength of the personal-ambient associations have not been evaluated quantitatively in a systematic manner. A quantitative research synthesis was conducted to examine these issues based on peer-reviewed publications in the past 30 years. Factors affecting the strength of the personal-ambient associations across the studies were also examined with meta-regression. Ambient NO2 was found to be significantly associated with personal NO2 exposures, with estimates of 0.42, 0.16, and 0.72 for overall pooled, longitudinal and daily average correlation coefficients based on random-effects meta-analysis. This conclusion was robust after correction for publication bias with correlation coefficients of 0.37, 0.16 and 0.45. We found that season and some population characteristics, such as pre-existing disease, were significant factors affecting the strength of the personal-ambient associations. More meaningful and rigorous comparisons would be possible if greater detail were published on the study design (e.g. local and indoor sources, housing characteristics, etc.) and data quality (e.g., detection limits and percent of data above detection limits).
Highlights ► Associations between ambient NO2 and personal exposures to NO2 were examined. ► A meta-analysis was performed on studies conducted over the past 30 years. ► Factors determining the strength of these associations were examined. ► Season, age, and pre-existing disease significantly affected the strength of the associations. ► In general, ambient NO2 was found to be significantly associated with personal exposure to NO2.
Associations between personal exposures and ambient concentrations of nitrogen dioxide: A quantitative research synthesis
Abstract Although positive associations between ambient NO2 concentrations and personal exposures have generally been found by exposure studies, the strength of the associations varied among studies. Differences in results could be related to differences in study design and in exposure factors. However, the effects of study design, exposure factors, and sampling and measurement errors on the strength of the personal-ambient associations have not been evaluated quantitatively in a systematic manner. A quantitative research synthesis was conducted to examine these issues based on peer-reviewed publications in the past 30 years. Factors affecting the strength of the personal-ambient associations across the studies were also examined with meta-regression. Ambient NO2 was found to be significantly associated with personal NO2 exposures, with estimates of 0.42, 0.16, and 0.72 for overall pooled, longitudinal and daily average correlation coefficients based on random-effects meta-analysis. This conclusion was robust after correction for publication bias with correlation coefficients of 0.37, 0.16 and 0.45. We found that season and some population characteristics, such as pre-existing disease, were significant factors affecting the strength of the personal-ambient associations. More meaningful and rigorous comparisons would be possible if greater detail were published on the study design (e.g. local and indoor sources, housing characteristics, etc.) and data quality (e.g., detection limits and percent of data above detection limits).
Highlights ► Associations between ambient NO2 and personal exposures to NO2 were examined. ► A meta-analysis was performed on studies conducted over the past 30 years. ► Factors determining the strength of these associations were examined. ► Season, age, and pre-existing disease significantly affected the strength of the associations. ► In general, ambient NO2 was found to be significantly associated with personal exposure to NO2.
Associations between personal exposures and ambient concentrations of nitrogen dioxide: A quantitative research synthesis
Meng, Q.Y. (author) / Svendsgaard, D. (author) / Kotchmar, D.J. (author) / Pinto, J.P. (author)
Atmospheric Environment ; 57 ; 322-329
2012-04-16
8 pages
Article (Journal)
Electronic Resource
English
Impact of Microenvironmental Nitrogen Dioxide Concentrations on Personal Exposures in Australia
| Taylor & Francis Verlag | 2000