The DOI matches its Crossref record; 112 of the 112 references it cites were found in a registry or an index.
Association between Air Pollutants and Asthma Emergency Room Visits and Hospital Admissions in Time Series Studies: A Systematic Review and Meta-Analysis
Open accessAbstract
BACKGROUND: Air pollution constitutes a significant stimulus of asthma exacerbations; however, the impacts of exposure to major air pollutants on asthma-related hospital admissions and emergency room visits (ERVs) have not been fully determined. OBJECTIVE: We sought to quantify the associations between short-term exposure to air pollutants [ozone (O3), carbon monoxide (CO), nitrogen dioxide (NO2), sulfur dioxide (SO2), and particulate matter ≤10 μm (PM10) and PM2.5] and the asthma-related emergency room visits (ERV) and hospitalizations. METHODS: Systematic computerized searches without language limitation were performed. Pooled relative risks (RRs) and 95% confidence intervals (95%CIs) were estimated using the random-effect models. Sensitivity analyses and subgroup analyses were also performed. RESULTS: After screening of 246 studies, 87 were included in our analyses. Air pollutants were associated with significantly increased risks of asthma ERVs and hospitalizations [O3: RR(95%CI), 1.009 (1.006, 1.011); I2 = 87.8%, population-attributable fraction (PAF) (95%CI): 0.8 (0.6, 1.1); CO: RR(95%CI), 1.045 (1.029, 1.061); I2 = 85.7%, PAF (95%CI): 4.3 (2.8, 5.7); NO2: RR(95%CI), 1.018 (1.014, 1.022); I2 = 87.6%, PAF (95%CI): 1.8 (1.4, 2.2); SO2: RR(95%CI), 1.011 (1.007, 1.015); I2 = 77.1%, PAF (95%CI): 1.1 (0.7, 1.5); PM10: RR(95%CI), 1.010 (1.008, 1.013); I2 = 69.1%, PAF (95%CI): 1.1 (0.8, 1.3); PM2.5: RR(95%CI), 1.023 (1.015, 1.031); I2 = 82.8%, PAF (95%CI): 2.3 (1.5, 3.1)]. Sensitivity analyses yielded compatible findings as compared with the overall analyses without publication bias. Stronger associations were found in hospitalized males, children and elderly patients in warm seasons with lag of 2 days or greater. CONCLUSION: Short-term exposures to air pollutants account for increased risks of asthma-related ERVs and hospitalizations that constitute a considerable healthcare utilization and socioeconomic burden.
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Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the PRISMA statement
Moher, D., Liberati, A., Tetzlaff, J., Altman, D. G., & for the PRISMA Group (2009) · BMJ · doi:10.1136/bmj.b2535 · Cited by 83,823
Measuring inconsistency in meta-analyses
Higgins, J. P. T., Thompson, S. G., Deeks, J. J., & Altman, D. G. (2003) · BMJ · doi:10.1136/bmj.327.7414.557 · Cited by 63,139
Bias in meta-analysis detected by a simple, graphical test
Egger, M., Smith, G. D., Schneider, M., & Minder, C. (1997) · BMJ · doi:10.1136/bmj.315.7109.629 · Cited by 56,722
Preferred reporting items for systematic reviews and meta-analyses: the PRISMA Statement.
(2009) · PubMed Central · Cited by 44,859
Brown, R. A., Hastie, T. J., & Tibshirani, R. J. (1991) · Biometrics · doi:10.2307/2532174 · Cited by 8,176
Koyak, R. A., Hastie, T. J., & Tibshirani, R. J. (1991) · Journal of the American Statistical Association · doi:10.2307/2290538 · Cited by 7,596
Health Effects of Fine Particulate Air Pollution: Lines that Connect
Pope, C. A., & Dockery, D. W. (2006) · Journal of the Air & Waste Management Association · doi:10.1080/10473289.2006.10464485 · Cited by 6,583
Busse, W. W., & Lemanske, R. F. (2001) · New England Journal of Medicine · doi:10.1056/nejm200102013440507 · Cited by 1,606
A review of land-use regression models to assess spatial variation of outdoor air pollution
Hoek, G., Beelen, R., de Hoogh, K., Vienneau, D., Gulliver, J., Fischer, P., & Briggs, D. (2008) · Atmospheric Environment · doi:10.1016/j.atmosenv.2008.05.057 · Cited by 1,395
Generalized additive models for medical research
Hastie, T., & Tibshirani, R. (1995) · Statistical Methods in Medical Research · doi:10.1177/096228029500400302 · Cited by 1,266
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Venter, Z. S., Aunan, K., Chowdhury, S., & Lelieveld, J. (2020) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2006853117 · Cited by 1,081
Air pollution and its effects on the immune system
Glencross, D. A., Ho, T.-R., Camiña, N., Hawrylowicz, C. M., & Pfeffer, P. E. (2020) · Free Radical Biology and Medicine · doi:10.1016/j.freeradbiomed.2020.01.179 · Cited by 726
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Impact of Air Pollution on Asthma Outcomes
Tiotiu, A. I., Novakova, P., Nedeva, D., Chong-Neto, H. J., Novakova, S., Steiropoulos, P., & Kowal, K. (2020) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph17176212 · Cited by 513
Anenberg, S. C., Henze, D. K., Tinney, V., Kinney, P. L., Raich, W., Fann, N., Malley, C. S., Roman, H., Lamsal, L., Duncan, B., et al. (2018) · Environmental Health Perspectives · doi:10.1289/ehp3766 · Cited by 337
Metadata
- Authors
- Zheng, X.-Y., Ding, H., Jiang, L.-N., Chen, S.-W., Zheng, J.-P., Qiu, M., Zhou, Y.-X., Chen, Q., & Guan, W.-J.
- Venue
- PLOS ONE
- Publisher
- Public Library of Science (PLoS)
- Published
- 2015-09-18
- Volume
- 10
- Issue
- 9
- Pages
- e0138146
- ISSN
- 1932-6203 (ISSN-L)
- OpenAlex
- W1466919451
- Cited by
- 440
- References
- 112
- FWCI
- 3.91
- Type
- journal article
- Language
- en
- Open access
- gold
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- Zheng, X.-Y., Ding, H., Jiang, L.-N., Chen, S.-W., Zheng, J.-P., Qiu, M., Zhou, Y.-X., Chen, Q., & Guan, W.-J. (2015). Association between Air Pollutants and Asthma Emergency Room Visits and Hospital Admissions in Time Series Studies: A Systematic Review and Meta-Analysis. PLOS ONE. https://doi.org/10.1371/journal.pone.0138146
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