Tree pollen and hospitalization for asthma in urban Canada.
Identifieur interne : 003769 ( Main/Exploration ); précédent : 003768; suivant : 003770Tree pollen and hospitalization for asthma in urban Canada.
Auteurs : Robert E. Dales [Canada] ; Sabit Cakmak ; Stan Judek ; Frances CoatesSource :
- International archives of allergy and immunology [ 1423-0097 ] ; 2008.
Descripteurs français
- KwdFr :
- MESH :
- immunologie : Arbres, Asthme, Pollen.
- statistiques et données numériques : Hospitalisation.
- thérapie : Asthme.
- épidémiologie : Asthme, Canada.
- Femelle, Humains, Mâle, Population urbaine, Temps (météorologie).
- Wicri :
- geographic : Canada.
English descriptors
- KwdEn :
- MESH :
Abstract
BACKGROUND
Allergy to tree pollen is common and aeroallergens have been associated with severe asthma exacerbations in the community setting. To determine the impact of different trees on asthma, we tested the association between daily hospitalizations for asthma and daily concentrations of different tree pollens in 10 large Canadian cities.
METHODS
Daily time-series analyses were employed to remove unwanted temporal trends. For each family or genus, results were adjusted for day of the week, temperature, barometric pressure and relative humidity. Results were expressed as the percentage increase in asthma hospitalizations related to an increase in tree pollen concentration equivalent in magnitude to its interquartile range.
RESULTS
For an interquartile increase in daily tree pollen concentration, percent increases in daily hospitalization for asthma were: 2.63% (95% CI 1.19-4.07) for Ulmus (elm), 2.45% (1.12-3.78) for the group containing Pinaceae (pine, fir, spruce), Tsuga (hemlock) and Larix (larch, tamarack); 2.32% (0.93-3.71) for the group containing Quercus (oak) and Castanea (chestnut), and 2.16% (0.70-3.62) for Acer (boxelder and maple). Statistically significant (p < 0.05) but small (<2%) effects were observed for Fraxinus (ash), Populus (aspen, poplar), Alnus (alder), Betula (birch) and Corylus (hazelnut).
CONCLUSIONS
Several common tree pollens are an important cause of acute exacerbations of asthma severe enough to require hospitalization.
DOI: 10.1159/000116360
PubMed: 18270491
Affiliations:
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Le document en format XML
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Dales</name><affiliation wicri:level="1"><nlm:affiliation>University of Ottawa, Ottawa, Ont., Canada. rdales@ohri.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>University of Ottawa, Ottawa, Ont.</wicri:regionArea><wicri:noRegion>Ont.</wicri:noRegion></affiliation></author><author><name sortKey="Cakmak, Sabit" sort="Cakmak, Sabit" uniqKey="Cakmak S" first="Sabit" last="Cakmak">Sabit Cakmak</name></author><author><name sortKey="Judek, Stan" sort="Judek, Stan" uniqKey="Judek S" first="Stan" last="Judek">Stan Judek</name></author><author><name sortKey="Coates, Frances" sort="Coates, Frances" uniqKey="Coates F" first="Frances" last="Coates">Frances Coates</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2008">2008</date><idno type="RBID">pubmed:18270491</idno><idno type="pmid">18270491</idno><idno type="doi">10.1159/000116360</idno><idno type="wicri:Area/Main/Corpus">003949</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003949</idno><idno type="wicri:Area/Main/Curation">003949</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003949</idno><idno type="wicri:Area/Main/Exploration">003949</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Tree pollen and hospitalization for asthma in urban Canada.</title><author><name sortKey="Dales, Robert E" sort="Dales, Robert E" uniqKey="Dales R" first="Robert E" last="Dales">Robert E. Dales</name><affiliation wicri:level="1"><nlm:affiliation>University of Ottawa, Ottawa, Ont., Canada. rdales@ohri.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>University of Ottawa, Ottawa, Ont.</wicri:regionArea><wicri:noRegion>Ont.</wicri:noRegion></affiliation></author><author><name sortKey="Cakmak, Sabit" sort="Cakmak, Sabit" uniqKey="Cakmak S" first="Sabit" last="Cakmak">Sabit Cakmak</name></author><author><name sortKey="Judek, Stan" sort="Judek, Stan" uniqKey="Judek S" first="Stan" last="Judek">Stan Judek</name></author><author><name sortKey="Coates, Frances" sort="Coates, Frances" uniqKey="Coates F" first="Frances" last="Coates">Frances Coates</name></author></analytic><series><title level="j">International archives of allergy and immunology</title><idno type="eISSN">1423-0097</idno><imprint><date when="2008" type="published">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Asthma (epidemiology)</term><term>Asthma (immunology)</term><term>Asthma (therapy)</term><term>Canada (epidemiology)</term><term>Female (MeSH)</term><term>Hospitalization (statistics & numerical data)</term><term>Humans (MeSH)</term><term>Male (MeSH)</term><term>Pollen (immunology)</term><term>Trees (immunology)</term><term>Urban Population (MeSH)</term><term>Weather (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (immunologie)</term><term>Asthme (immunologie)</term><term>Asthme (thérapie)</term><term>Asthme (épidémiologie)</term><term>Canada (épidémiologie)</term><term>Femelle (MeSH)</term><term>Hospitalisation (statistiques et données numériques)</term><term>Humains (MeSH)</term><term>Mâle (MeSH)</term><term>Pollen (immunologie)</term><term>Population urbaine (MeSH)</term><term>Temps (météorologie) (MeSH)</term></keywords><keywords scheme="MESH" type="geographic" qualifier="epidemiology" xml:lang="en"><term>Canada</term></keywords><keywords scheme="MESH" qualifier="epidemiology" xml:lang="en"><term>Asthma</term></keywords><keywords scheme="MESH" qualifier="immunologie" xml:lang="fr"><term>Arbres</term><term>Asthme</term><term>Pollen</term></keywords><keywords scheme="MESH" qualifier="immunology" xml:lang="en"><term>Asthma</term><term>Pollen</term><term>Trees</term></keywords><keywords scheme="MESH" qualifier="statistics & numerical data" xml:lang="en"><term>Hospitalization</term></keywords><keywords scheme="MESH" qualifier="statistiques et données numériques" xml:lang="fr"><term>Hospitalisation</term></keywords><keywords scheme="MESH" qualifier="therapy" xml:lang="en"><term>Asthma</term></keywords><keywords scheme="MESH" qualifier="thérapie" xml:lang="fr"><term>Asthme</term></keywords><keywords scheme="MESH" qualifier="épidémiologie" xml:lang="fr"><term>Asthme</term><term>Canada</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Female</term><term>Humans</term><term>Male</term><term>Urban Population</term><term>Weather</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Femelle</term><term>Humains</term><term>Mâle</term><term>Population urbaine</term><term>Temps (météorologie)</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>BACKGROUND</b></p><p>Allergy to tree pollen is common and aeroallergens have been associated with severe asthma exacerbations in the community setting. To determine the impact of different trees on asthma, we tested the association between daily hospitalizations for asthma and daily concentrations of different tree pollens in 10 large Canadian cities.</p></div><div type="abstract" xml:lang="en"><p><b>METHODS</b></p><p>Daily time-series analyses were employed to remove unwanted temporal trends. For each family or genus, results were adjusted for day of the week, temperature, barometric pressure and relative humidity. Results were expressed as the percentage increase in asthma hospitalizations related to an increase in tree pollen concentration equivalent in magnitude to its interquartile range.</p></div><div type="abstract" xml:lang="en"><p><b>RESULTS</b></p><p>For an interquartile increase in daily tree pollen concentration, percent increases in daily hospitalization for asthma were: 2.63% (95% CI 1.19-4.07) for Ulmus (elm), 2.45% (1.12-3.78) for the group containing Pinaceae (pine, fir, spruce), Tsuga (hemlock) and Larix (larch, tamarack); 2.32% (0.93-3.71) for the group containing Quercus (oak) and Castanea (chestnut), and 2.16% (0.70-3.62) for Acer (boxelder and maple). Statistically significant (p < 0.05) but small (<2%) effects were observed for Fraxinus (ash), Populus (aspen, poplar), Alnus (alder), Betula (birch) and Corylus (hazelnut).</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSIONS</b></p><p>Several common tree pollens are an important cause of acute exacerbations of asthma severe enough to require hospitalization.</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">18270491</PMID><DateCompleted><Year>2008</Year><Month>07</Month><Day>08</Day></DateCompleted><DateRevised><Year>2008</Year><Month>06</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1423-0097</ISSN><JournalIssue CitedMedium="Internet"><Volume>146</Volume><Issue>3</Issue><PubDate><Year>2008</Year></PubDate></JournalIssue><Title>International archives of allergy and immunology</Title><ISOAbbreviation>Int Arch Allergy Immunol</ISOAbbreviation></Journal><ArticleTitle>Tree pollen and hospitalization for asthma in urban Canada.</ArticleTitle><Pagination><MedlinePgn>241-7</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1159/000116360</ELocationID><Abstract><AbstractText Label="BACKGROUND" NlmCategory="BACKGROUND">Allergy to tree pollen is common and aeroallergens have been associated with severe asthma exacerbations in the community setting. To determine the impact of different trees on asthma, we tested the association between daily hospitalizations for asthma and daily concentrations of different tree pollens in 10 large Canadian cities.</AbstractText><AbstractText Label="METHODS" NlmCategory="METHODS">Daily time-series analyses were employed to remove unwanted temporal trends. For each family or genus, results were adjusted for day of the week, temperature, barometric pressure and relative humidity. Results were expressed as the percentage increase in asthma hospitalizations related to an increase in tree pollen concentration equivalent in magnitude to its interquartile range.</AbstractText><AbstractText Label="RESULTS" NlmCategory="RESULTS">For an interquartile increase in daily tree pollen concentration, percent increases in daily hospitalization for asthma were: 2.63% (95% CI 1.19-4.07) for Ulmus (elm), 2.45% (1.12-3.78) for the group containing Pinaceae (pine, fir, spruce), Tsuga (hemlock) and Larix (larch, tamarack); 2.32% (0.93-3.71) for the group containing Quercus (oak) and Castanea (chestnut), and 2.16% (0.70-3.62) for Acer (boxelder and maple). Statistically significant (p < 0.05) but small (<2%) effects were observed for Fraxinus (ash), Populus (aspen, poplar), Alnus (alder), Betula (birch) and Corylus (hazelnut).</AbstractText><AbstractText Label="CONCLUSIONS" NlmCategory="CONCLUSIONS">Several common tree pollens are an important cause of acute exacerbations of asthma severe enough to require hospitalization.</AbstractText><CopyrightInformation>(c) 2008 S. Karger AG, Basel</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Dales</LastName><ForeName>Robert E</ForeName><Initials>RE</Initials><AffiliationInfo><Affiliation>University of Ottawa, Ottawa, Ont., Canada. rdales@ohri.ca</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Cakmak</LastName><ForeName>Sabit</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Judek</LastName><ForeName>Stan</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Coates</LastName><ForeName>Frances</ForeName><Initials>F</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2008</Year><Month>02</Month><Day>13</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Int Arch Allergy Immunol</MedlineTA><NlmUniqueID>9211652</NlmUniqueID><ISSNLinking>1018-2438</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001249" MajorTopicYN="N">Asthma</DescriptorName><QualifierName UI="Q000453" MajorTopicYN="N">epidemiology</QualifierName><QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName><QualifierName UI="Q000628" MajorTopicYN="N">therapy</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002170" MajorTopicYN="N" Type="Geographic">Canada</DescriptorName><QualifierName UI="Q000453" MajorTopicYN="N">epidemiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005260" MajorTopicYN="N">Female</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006760" MajorTopicYN="N">Hospitalization</DescriptorName><QualifierName UI="Q000706" MajorTopicYN="N">statistics & numerical data</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008297" MajorTopicYN="N">Male</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D011058" MajorTopicYN="N">Pollen</DescriptorName><QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014505" MajorTopicYN="N">Urban Population</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014887" MajorTopicYN="N">Weather</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2007</Year><Month>08</Month><Day>20</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2007</Year><Month>11</Month><Day>21</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2008</Year><Month>2</Month><Day>14</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2008</Year><Month>7</Month><Day>9</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2008</Year><Month>2</Month><Day>14</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">18270491</ArticleId><ArticleId IdType="pii">000116360</ArticleId><ArticleId IdType="doi">10.1159/000116360</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Cakmak, Sabit" sort="Cakmak, Sabit" uniqKey="Cakmak S" first="Sabit" last="Cakmak">Sabit Cakmak</name><name sortKey="Coates, Frances" sort="Coates, Frances" uniqKey="Coates F" first="Frances" last="Coates">Frances Coates</name><name sortKey="Judek, Stan" sort="Judek, Stan" uniqKey="Judek S" first="Stan" last="Judek">Stan Judek</name></noCountry><country name="Canada"><noRegion><name sortKey="Dales, Robert E" sort="Dales, Robert E" uniqKey="Dales R" first="Robert E" last="Dales">Robert E. 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