Abstract
BACKGROUND AND OBJECTIVES: Results from several studies over the past five years have shown that the current levels of pollutants in Europe and North America have adverse short term effects on health. The APHEA project aims to quantifying these in Europe, using standardised methodology. The project protocol and analytical methodology are presented here. DESIGN: Daily time series data were gathered for several air pollutants (sulphur dioxide; particulate matter, measured as total particles or as the particle fraction with an aerodynamic diameter smaller than a certain cut off, or as black smoke; nitrogen dioxide; and ozone) and health outcomes (the total and cause specific number of deaths and emergency hospital admissions). The data included fulfilled the quality criteria set by the APHEA protocol. SETTING: Fifteen European cities from 10 different countries with a total population over 25 million. METHODOLOGY: The APHEA collaborative group decided on a specific methodological procedure to control for confounding effects and evaluate the hypothesis. At the same time there was sufficient flexibility to allow local characteristics to be taken into account. The procedure included modelling of all potential confounding factors (that is, seasonal and long term patterns, meteorological factors, day of the week, holidays, and other unusual events), choosing the "best" air pollution models, and applying diagnostic tools to check the adequacy of the models. The final analysis used autoregressive Poisson models allowing for overdispersion. Effects were reported as relative risks contrasting defined increases in the corresponding pollutant levels. Each participating group applied the analyses to their own data. CONCLUSIONS: This methodology enabled results from many different European settings to be considered collectively. It represented the best available compromise between feasibility, comparability, and local adaptibility when using aggregated time series data not originally collected for the purpose of epidemiological studies.
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Selected References
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- Camilli A. E., Robbins D. R., Lebowitz M. D. Death certificate reporting of confirmed airways obstructive disease. Am J Epidemiol. 1991 Apr 15;133(8):795–800. doi: 10.1093/oxfordjournals.aje.a115958. [DOI] [PubMed] [Google Scholar]
- Dab W., Medina S., Quénel P., Le Moullec Y., Le Tertre A., Thelot B., Monteil C., Lameloise P., Pirard P., Momas I. Short term respiratory health effects of ambient air pollution: results of the APHEA project in Paris. J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):s42–s46. doi: 10.1136/jech.50.suppl_1.s42. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Derriennic F., Richardson S., Mollie A., Lellouch J. Short-term effects of sulphur dioxide pollution on mortality in two French cities. Int J Epidemiol. 1989 Mar;18(1):186–197. doi: 10.1093/ije/18.1.186. [DOI] [PubMed] [Google Scholar]
- Flegal K. M., Brownie C., Haas J. D. The effects of exposure misclassification on estimates of relative risk. Am J Epidemiol. 1986 Apr;123(4):736–751. doi: 10.1093/oxfordjournals.aje.a114294. [DOI] [PubMed] [Google Scholar]
- Hatzakis A., Katsouyanni K., Kalandidi A., Day N., Trichopoulos D. Short-term effects of air pollution on mortality in Athens. Int J Epidemiol. 1986 Mar;15(1):73–81. doi: 10.1093/ije/15.1.73. [DOI] [PubMed] [Google Scholar]
- Katsouyanni K., Zmirou D., Spix C., Sunyer J., Schouten J. P., Pönkä A., Anderson H. R., Le Moullec Y., Wojtyniak B., Vigotti M. A. Short-term effects of air pollution on health: a European approach using epidemiological time-series data. The APHEA project: background, objectives, design. Eur Respir J. 1995 Jun;8(6):1030–1038. [PubMed] [Google Scholar]
- Kinney P. L., Ozkaynak H. Associations of daily mortality and air pollution in Los Angeles County. Environ Res. 1991 Apr;54(2):99–120. doi: 10.1016/s0013-9351(05)80094-5. [DOI] [PubMed] [Google Scholar]
- Moschandreas D. J. Exposure to pollutants and daily time budgets of people. Bull N Y Acad Med. 1981 Dec;57(10):845–859. [PMC free article] [PubMed] [Google Scholar]
- Nielsen G. P., Björnsson J., Jonasson J. G. The accuracy of death certificates. Implications for health statistics. Virchows Arch A Pathol Anat Histopathol. 1991;419(2):143–146. doi: 10.1007/BF01600228. [DOI] [PubMed] [Google Scholar]
- Ponce de Leon A., Anderson H. R., Bland J. M., Strachan D. P., Bower J. Effects of air pollution on daily hospital admissions for respiratory disease in London between 1987-88 and 1991-92. J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):s63–s70. doi: 10.1136/jech.50.suppl_1.s63. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Pope C. A., 3rd, Schwartz J., Ransom M. R. Daily mortality and PM10 pollution in Utah Valley. Arch Environ Health. 1992 May-Jun;47(3):211–217. doi: 10.1080/00039896.1992.9938351. [DOI] [PubMed] [Google Scholar]
- Pönkä A., Virtanen M. Asthma and ambient air pollution in Helsinki. J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):s59–s62. doi: 10.1136/jech.50.suppl_1.s59. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Schouten J. P., Vonk J. M., de Graaf A. Short term effects of air pollution on emergency hospital admissions for respiratory disease: results of the APHEA project in two major cities in The Netherlands, 1977-89. J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):s22–s29. doi: 10.1136/jech.50.suppl_1.s22. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Schwartz J. Air pollution and daily mortality in Birmingham, Alabama. Am J Epidemiol. 1993 May 15;137(10):1136–1147. doi: 10.1093/oxfordjournals.aje.a116617. [DOI] [PubMed] [Google Scholar]
- Schwartz J. Air pollution and daily mortality: a review and meta analysis. Environ Res. 1994 Jan;64(1):36–52. doi: 10.1006/enrs.1994.1005. [DOI] [PubMed] [Google Scholar]
- Schwartz J., Dockery D. W. Particulate air pollution and daily mortality in Steubenville, Ohio. Am J Epidemiol. 1992 Jan 1;135(1):12–25. doi: 10.1093/oxfordjournals.aje.a116195. [DOI] [PubMed] [Google Scholar]
- Spix C., Wichmann H. E. Daily mortality and air pollutants: findings from Köln, Germany. J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):s52–s58. doi: 10.1136/jech.50.suppl_1.s52. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sunyer J., Antó J. M., Murillo C., Saez M. Effects of urban air pollution on emergency room admissions for chronic obstructive pulmonary disease. Am J Epidemiol. 1991 Aug 1;134(3):277–289. doi: 10.1093/oxfordjournals.aje.a116081. [DOI] [PubMed] [Google Scholar]
- Touloumi G., Samoli E., Katsouyanni K. Daily mortality and "winter type" air pollution in Athens, Greece--a time series analysis within the APHEA project. J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):s47–s51. doi: 10.1136/jech.50.suppl_1.s47. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wojtyniak B., Piekarski T. Short term effect of air pollution on mortality in Polish urban populations--what is different? J Epidemiol Community Health. 1996 Apr;50 (Suppl 1):S36–S41. doi: 10.1136/jech.50.suppl_1.s36. [DOI] [PMC free article] [PubMed] [Google Scholar]
