Comparison of the epidemiology of laboratory-confirmed influenza A and influenza B cases in Manitoba, Canada.
Identifieur interne : 000224 ( Main/Exploration ); précédent : 000223; suivant : 000225Comparison of the epidemiology of laboratory-confirmed influenza A and influenza B cases in Manitoba, Canada.
Auteurs : Aynslie M. Hinds [Canada] ; Songul Bozat-Emre [Canada] ; Paul Van Caeseele [Canada] ; Salaheddin M. Mahmud [Canada]Source :
- BMC public health [ 1471-2458 ] ; 2015.
Descripteurs français
- KwdFr :
- Adolescent, Adulte, Adulte d'âge moyen, Caractéristiques de l'habitat, Enfant, Enfant d'âge préscolaire, Facteurs socioéconomiques, Femelle, Flambées de maladies, Grippe humaine (épidémiologie), Hospitalisation (), Humains, Incidence, Jeune adulte, Manitoba (épidémiologie), Mâle, Nourrisson, Nouveau-né, Répartition par âge, Services de santé (), Sujet âgé, Vaccins antigrippaux (administration et posologie), Virus de la grippe A, Virus influenza B, État de santé.
- MESH :
- administration et posologie : Vaccins antigrippaux.
- épidémiologie : Grippe humaine, Manitoba.
- Adolescent, Adulte, Adulte d'âge moyen, Caractéristiques de l'habitat, Enfant, Enfant d'âge préscolaire, Facteurs socioéconomiques, Femelle, Flambées de maladies, Hospitalisation, Humains, Incidence, Jeune adulte, Mâle, Nourrisson, Nouveau-né, Répartition par âge, Services de santé, Sujet âgé, Virus de la grippe A, Virus influenza B, État de santé.
English descriptors
- KwdEn :
- Adolescent, Adult, Age Distribution, Aged, Child, Child, Preschool, Disease Outbreaks, Female, Health Services (statistics & numerical data), Health Status, Hospitalization (statistics & numerical data), Humans, Incidence, Infant, Infant, Newborn, Influenza A virus, Influenza B virus, Influenza Vaccines (administration & dosage), Influenza, Human (epidemiology), Male, Manitoba (epidemiology), Middle Aged, Residence Characteristics, Socioeconomic Factors, Young Adult.
- MESH :
- chemical , administration & dosage : Influenza Vaccines.
- epidemiology : Influenza, Human, Manitoba.
- statistics & numerical data : Health Services, Hospitalization.
- Adolescent, Adult, Age Distribution, Aged, Child, Child, Preschool, Disease Outbreaks, Female, Health Status, Humans, Incidence, Infant, Infant, Newborn, Influenza A virus, Influenza B virus, Male, Middle Aged, Residence Characteristics, Socioeconomic Factors, Young Adult.
Abstract
BACKGROUND
Despite the public health significance of annual influenza outbreaks, the literature comparing the epidemiology of influenza A and B infections is limited and dated and may not reflect recent trends. In Canada, the relative contribution of influenza A and B to the burden of morbidity is not well understood. We examined rates of laboratory-confirmed cases of influenza A and B (LCI-A and LCI-B) in the Canadian province of Manitoba between 1993 and 2008 and compared cases of the two types in terms of socio-demographic and clinical characteristics.
METHODS
Laboratory-confirmed cases of influenza A and B in Manitoba between 1993 and 2008 were identified from the Cadham Provincial Laboratory (CPL) Database and linked to de-identified provincial administrative health records. Crude and age-adjusted incidence rates of LCI-A and LCI-B were calculated. Demographic characteristics, health status, health service use, and vaccination history were compared by influenza type.
RESULTS
Over the study period, 1,404 of LCI-A and 445 cases of LCI-B were diagnosed, corresponding to an annual age-standardized rate of 7.2 (95% CI: 6.5-7.9) for LCI-A and 2.2 (CI: 1.5 - 3.0) per 100,000 person-years for LCI-B. Annual rates fluctuated widely but there was less variation in the LCI-B rates. For LCI-A, but not LCI-B, incidence was inversely related to household income. Older age, urban residence and past hospitalization were associated with increased detection of LCI-A whereas receipt of the influenza vaccine was associated with decreased LCI-A detection. Once socio-demographic variables were controlled, having a pre-existing chronic disease or immune suppression was not related to influenza type.
CONCLUSION
Influenza A and B affected different segments of the population. Older age was associated with increased LCI-A detection, but not with pre-existing chronic diseases. This information may be useful to public health professionals in planning and evaluating new and existing seasonal influenza vaccines.
DOI: 10.1186/s12889-015-1351-z
PubMed: 25633280
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<term>Child</term>
<term>Child, Preschool</term>
<term>Disease Outbreaks</term>
<term>Female</term>
<term>Health Services (statistics & numerical data)</term>
<term>Health Status</term>
<term>Hospitalization (statistics & numerical data)</term>
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<term>Incidence</term>
<term>Infant</term>
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<term>Adulte</term>
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<term>Caractéristiques de l'habitat</term>
<term>Enfant</term>
<term>Enfant d'âge préscolaire</term>
<term>Facteurs socioéconomiques</term>
<term>Femelle</term>
<term>Flambées de maladies</term>
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<term>Humains</term>
<term>Incidence</term>
<term>Jeune adulte</term>
<term>Manitoba (épidémiologie)</term>
<term>Mâle</term>
<term>Nourrisson</term>
<term>Nouveau-né</term>
<term>Répartition par âge</term>
<term>Services de santé ()</term>
<term>Sujet âgé</term>
<term>Vaccins antigrippaux (administration et posologie)</term>
<term>Virus de la grippe A</term>
<term>Virus influenza B</term>
<term>État de santé</term>
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<term>Hospitalization</term>
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<term>Adult</term>
<term>Age Distribution</term>
<term>Aged</term>
<term>Child</term>
<term>Child, Preschool</term>
<term>Disease Outbreaks</term>
<term>Female</term>
<term>Health Status</term>
<term>Humans</term>
<term>Incidence</term>
<term>Infant</term>
<term>Infant, Newborn</term>
<term>Influenza A virus</term>
<term>Influenza B virus</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Residence Characteristics</term>
<term>Socioeconomic Factors</term>
<term>Young Adult</term>
</keywords>
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<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Caractéristiques de l'habitat</term>
<term>Enfant</term>
<term>Enfant d'âge préscolaire</term>
<term>Facteurs socioéconomiques</term>
<term>Femelle</term>
<term>Flambées de maladies</term>
<term>Hospitalisation</term>
<term>Humains</term>
<term>Incidence</term>
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<term>Répartition par âge</term>
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<front><div type="abstract" xml:lang="en"><p><b>BACKGROUND</b>
</p>
<p>Despite the public health significance of annual influenza outbreaks, the literature comparing the epidemiology of influenza A and B infections is limited and dated and may not reflect recent trends. In Canada, the relative contribution of influenza A and B to the burden of morbidity is not well understood. We examined rates of laboratory-confirmed cases of influenza A and B (LCI-A and LCI-B) in the Canadian province of Manitoba between 1993 and 2008 and compared cases of the two types in terms of socio-demographic and clinical characteristics.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>METHODS</b>
</p>
<p>Laboratory-confirmed cases of influenza A and B in Manitoba between 1993 and 2008 were identified from the Cadham Provincial Laboratory (CPL) Database and linked to de-identified provincial administrative health records. Crude and age-adjusted incidence rates of LCI-A and LCI-B were calculated. Demographic characteristics, health status, health service use, and vaccination history were compared by influenza type.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>RESULTS</b>
</p>
<p>Over the study period, 1,404 of LCI-A and 445 cases of LCI-B were diagnosed, corresponding to an annual age-standardized rate of 7.2 (95% CI: 6.5-7.9) for LCI-A and 2.2 (CI: 1.5 - 3.0) per 100,000 person-years for LCI-B. Annual rates fluctuated widely but there was less variation in the LCI-B rates. For LCI-A, but not LCI-B, incidence was inversely related to household income. Older age, urban residence and past hospitalization were associated with increased detection of LCI-A whereas receipt of the influenza vaccine was associated with decreased LCI-A detection. Once socio-demographic variables were controlled, having a pre-existing chronic disease or immune suppression was not related to influenza type.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>CONCLUSION</b>
</p>
<p>Influenza A and B affected different segments of the population. Older age was associated with increased LCI-A detection, but not with pre-existing chronic diseases. This information may be useful to public health professionals in planning and evaluating new and existing seasonal influenza vaccines.</p>
</div>
</front>
</TEI>
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<Abstract><AbstractText Label="BACKGROUND" NlmCategory="BACKGROUND">Despite the public health significance of annual influenza outbreaks, the literature comparing the epidemiology of influenza A and B infections is limited and dated and may not reflect recent trends. In Canada, the relative contribution of influenza A and B to the burden of morbidity is not well understood. We examined rates of laboratory-confirmed cases of influenza A and B (LCI-A and LCI-B) in the Canadian province of Manitoba between 1993 and 2008 and compared cases of the two types in terms of socio-demographic and clinical characteristics.</AbstractText>
<AbstractText Label="METHODS" NlmCategory="METHODS">Laboratory-confirmed cases of influenza A and B in Manitoba between 1993 and 2008 were identified from the Cadham Provincial Laboratory (CPL) Database and linked to de-identified provincial administrative health records. Crude and age-adjusted incidence rates of LCI-A and LCI-B were calculated. Demographic characteristics, health status, health service use, and vaccination history were compared by influenza type.</AbstractText>
<AbstractText Label="RESULTS" NlmCategory="RESULTS">Over the study period, 1,404 of LCI-A and 445 cases of LCI-B were diagnosed, corresponding to an annual age-standardized rate of 7.2 (95% CI: 6.5-7.9) for LCI-A and 2.2 (CI: 1.5 - 3.0) per 100,000 person-years for LCI-B. Annual rates fluctuated widely but there was less variation in the LCI-B rates. For LCI-A, but not LCI-B, incidence was inversely related to household income. Older age, urban residence and past hospitalization were associated with increased detection of LCI-A whereas receipt of the influenza vaccine was associated with decreased LCI-A detection. Once socio-demographic variables were controlled, having a pre-existing chronic disease or immune suppression was not related to influenza type.</AbstractText>
<AbstractText Label="CONCLUSION" NlmCategory="CONCLUSIONS">Influenza A and B affected different segments of the population. Older age was associated with increased LCI-A detection, but not with pre-existing chronic diseases. This information may be useful to public health professionals in planning and evaluating new and existing seasonal influenza vaccines.</AbstractText>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hinds</LastName>
<ForeName>Aynslie M</ForeName>
<Initials>AM</Initials>
<AffiliationInfo><Affiliation>Vaccine and Drug Evaluation Centre, Department of Community Health Sciences, Faculty of Health Sciences, University of Manitoba, S111 - 750 Bannatyne Avenue, Winnipeg, Manitoba, R3E 0W3, Canada. umhinds0@myumanitoba.ca.</Affiliation>
</AffiliationInfo>
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<Author ValidYN="Y"><LastName>Bozat-Emre</LastName>
<ForeName>Songul</ForeName>
<Initials>S</Initials>
<AffiliationInfo><Affiliation>Vaccine and Drug Evaluation Centre, Department of Community Health Sciences, Faculty of Health Sciences, University of Manitoba, S111 - 750 Bannatyne Avenue, Winnipeg, Manitoba, R3E 0W3, Canada. songul.bozat-emre@gov.mb.ca.</Affiliation>
</AffiliationInfo>
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<Author ValidYN="Y"><LastName>Van Caeseele</LastName>
<ForeName>Paul</ForeName>
<Initials>P</Initials>
<AffiliationInfo><Affiliation>Department of Medical Microbiology, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada. Paul.Vancaeseele@gov.mb.ca.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>Cadham Provincial Laboratory, Winnipeg, Manitoba, Canada. Paul.Vancaeseele@gov.mb.ca.</Affiliation>
</AffiliationInfo>
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<Author ValidYN="Y"><LastName>Mahmud</LastName>
<ForeName>Salaheddin M</ForeName>
<Initials>SM</Initials>
<AffiliationInfo><Affiliation>Vaccine and Drug Evaluation Centre, Department of Community Health Sciences, Faculty of Health Sciences, University of Manitoba, S111 - 750 Bannatyne Avenue, Winnipeg, Manitoba, R3E 0W3, Canada. Salah.mahmud@gmail.com.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>Faculty of Pharmacy, University of Manitoba, Winnipeg, Manitoba, Canada. Salah.mahmud@gmail.com.</Affiliation>
</AffiliationInfo>
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