Does chronic exposure to high levels of nitrogen dioxide exacerbate the short-term effects of airborne particles?
Occup Environ Med
; 73(11): 772-778, 2016 Nov.
Article
em En
| MEDLINE
| ID: mdl-27503102
ABSTRACT
BACKGROUND:
Long-term exposure to air pollutants has been hypothesised as a factor in susceptibility to short-term exposure to particulate matter (PM), but results are not coherent. We studied the short-term effects of PM10 on mortality and assessed whether long-term exposure to nitrogen dioxide (NO2) modifies this association.METHODS:
We used a case-crossover design to evaluate daily PM10-related mortality among 124â 432 35+ year-old participants who died in Rome between 2001 and 2010 and maintained the same address for at least 5â years before death. Modification of PM10-related mortality by long-term NO2 exposure was determined by two-way interaction, while a three-way interaction was used to assess effect modification of high NO2 levels in population groups defined by sociodemographic position and pre-existing diseases.RESULTS:
Mortality increased by 0.82% (0.23-1.41%) for each 10â µg/m3 increase in PM10. Mortality rose by 1.22% (0.17-2.38%) in participants exposed to NO2 levels ≥50â µg/m3 and by 0.69% (0.03-1.34%) in those exposed to levels <50â µg/m3 with no effect modification (p-interaction 0.378). A suggestion of effect modification was seen in 85+-year-olds (3.10%; p-interaction 0.043), as well as in those with a pre-existing arrhythmia (3.26%; p-interaction 0.014) and chronic obstructive pulmonary disease (3.52%; p-interaction 0.042).CONCLUSIONS:
Long-term exposure to NO2 is not likely to induce susceptibility to short-term PM10 exposure in the overall population. However, an effect modification of NO2 is probable in the elderly and in those suffering from arrhythmias and chronic obstructive pulmonary disease.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Mortalidade
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Poluentes Atmosféricos
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Poluição do Ar
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Exposição Ambiental
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Material Particulado
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Dióxido de Nitrogênio
Tipo de estudo:
Clinical_trials
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Diagnostic_studies
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Etiology_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Female
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Humans
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Male
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Middle aged
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article