ArticleEnvironmental health : a global access science source2011
Implications of different approaches for characterizing ambient air pollutant concentrations within the urban airshed for time-series studies and health benefits analyses.
Article in Environmental health : a global access science source, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
17 citing papers in PubMed, 1 synthesis or guideline pooled it, 38 citations in OpenAlex.
- Pooled it
- Study on the impact of air pollutants on childhood asthma in Nanjing based on a distributed lag non-linear model.Frontiers in public health · 2025Article
- The Role of Neighborhood Air Pollution in Disparate Racial and Ethnic Asthma Acute Care Use.American journal of respiratory and critical care medicine · 2024Article
- Interactive effects of ambient fine particulate matter and ozone on daily mortality in 372 cities: two stage time series analysis.BMJ (Clinical research ed.) · 2023Article
- Monitoring vs. modeled exposure data in time-series studies of ambient air pollution and acute health outcomes.Journal of exposure science & environmental epidemiology · 2023Article
- Impacts of Regulations on Air Quality and Emergency Department Visits in the Atlanta Metropolitan Area, 1999-2013.Research report (Health Effects Institute) · 2018Article
- Ambient air pollution and emergency department visits for asthma in Erie County, New York 2007-2012.International archives of occupational and environmental health · 2018Article
- Ozone and childhood respiratory disease in three US cities: evaluation of effect measure modification by neighborhood socioeconomic status using a Bayesian hierarchical approach.Environmental health : a global access science source · 2017Article
- Current Methods and Challenges for Epidemiological Studies of the Associations Between Chemical Constituents of Particulate Matter and Health.Current environmental health reports · 2015Review
- The lung response to ozone is determined by age and is partially dependent on toll-Like receptor 4.Respiratory research · 2015Article
- Assessment of Air Pollution Impacts on Population Health in Bejaia City, Northern Algeria.Iranian journal of public health · 2014Article
- Outdoor air pollution and asthma.Lancet (London, England) · 2014Review
- Association of short-term increases in ambient air pollution and timing of initial asthma diagnosis among Medicaid-enrolled children in a metropolitan area.Environmental research · 2014Article
- Transcriptome profiling of the newborn mouse lung response to acute ozone exposure.Toxicological sciences : an official journal of the Society of Toxicology · 2014Article
- Measurement error in time-series analysis: a simulation study comparing modelled and monitored data.BMC medical research methodology · 2013Article
- Time series analysis of personal exposure to ambient air pollution and mortality using an exposure simulator.Journal of exposure science & environmental epidemiology · 2012Article
- Effects of ambient air pollution measurement error on health effect estimates in time-series studies: a simulation-based analysis.Journal of exposure science & environmental epidemiologyArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundIn time-series studies of the health effects of urban air pollutants, decisions must be made about how to characterize pollutant levels within the airshed.
methodsEmergency department visits for pediatric asthma exacerbations were collected from Atlanta hospitals. Concentrations of carbon monoxide, nitrogen dioxide, ozone, sulfur dioxide, particulate matter less than 10 microns in diameter (PM10), particulate matter less than 2.5 microns in diameter (PM2.5), and the PM2.5 components elemental carbon, organic carbon, and sulfate were obtained from networks of ambient air quality monitors. For each pollutant we created three different daily metrics. For one metric we used the measurements from a centrally-located monitor; for the second we averaged measurements across the network of monitors; and for the third we estimated the population-weighted average concentration using an isotropic spatial model. Rate ratios for each of the metrics were estimated from time-series models.
resultsFor pollutants with relatively homogeneous spatial distributions we observed only small differences in the rate ratio across the three metrics. Conversely, for spatially heterogeneous pollutants we observed larger differences in the rate ratios. For a given pollutant, the strength of evidence for an association (i.e., chi-square statistics) tended to be similar across metrics.
conclusionsGiven that the chi-square statistics were similar across the metrics, the differences in the rate ratios for the spatially heterogeneous pollutants may seem like a relatively small issue. However, these differences are important for health benefits analyses, where results from epidemiological studies on the health effects of pollutants (per unit change in concentration) are used to predict the health impacts of a reduction in pollutant concentrations. We discuss the relative merits of the different metrics as they pertain to time-series studies and health benefits analyses.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.