Worldwide time trends in the prevalence of symptoms of asthma, allergic rhinoconjunctivitis, and eczema in childhood: ISAAC Phases One and Three repeat multicountry cross-sectional surveys

Data for trends in prevalence of asthma, allergic rhinoconjunctivitis, and eczema over time are scarce. We repeated the International Study of Asthma and Allergies in Childhood (ISAAC) at least 5 years after Phase One, to examine changes in the prevalence of symptoms of these disorders. For the ISAA...

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Veröffentlicht in:The Lancet (British edition) Jg. 368; H. 9537; S. 733 - 743
Hauptverfasser: Asher, M Innes, Montefort, Stephen, Björkstén, Bengt, Lai, Christopher KW, Strachan, David P, Weiland, Stephan K, Williams, Hywel
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Elsevier Ltd 26.08.2006
Lancet
Elsevier Limited
Schlagworte:
Adolescent
Allergies
Asthma
Asthma - epidemiology
Asthma - physiopathology
Biological and medical sciences
Child
Children & youth
Chronic obstructive pulmonary disease, asthma
Cross-Sectional Studies
Eczema
Eczema - epidemiology
Eczema - physiopathology
General aspects
Global Health
Humans
International studies
Medical sciences
Miscellaneous
Pneumology
Prevalence
Public health. Hygiene
Public health. Hygiene-occupational medicine
Rhinitis - epidemiology
Rhinitis - physiopathology
Schools
Skin diseases
Surveys and Questionnaires
World
Allergy
Nose disease
Skin disease
Phase
Prevalence
Rhinitis
Conjunctiva disease
Conjunctivitis
Epidemiology
Cross sectional study
Eczema
Bronchus disease
ENT disease
Obstructive pulmonary disease
Child
Public health
Human
Immunopathology
Lung disease
Respiratory disease
Trend
Asthma
Medicine
Symptomatology
Eye disease
Survey
Surveillance
ISSN:0140-6736, 1474-547X, 1474-547X
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Zusammenfassung:Data for trends in prevalence of asthma, allergic rhinoconjunctivitis, and eczema over time are scarce. We repeated the International Study of Asthma and Allergies in Childhood (ISAAC) at least 5 years after Phase One, to examine changes in the prevalence of symptoms of these disorders. For the ISAAC Phase Three study, between 2002 and 2003, we did a cross-sectional questionnaire survey of 193 404 children aged 6–7 years from 66 centres in 37 countries, and 304 679 children aged 13–14 years from 106 centres in 56 countries, chosen from a random sample of schools in a defined geographical area. Phase Three was completed a mean of 7 years after Phase One. Most centres showed a change in prevalence of 1 or more SE for at least one disorder, with increases being twice as common as decreases, and increases being more common in the 6–7 year age-group than in the 13–14 year age-group, and at most levels of mean prevalence. An exception was asthma symptoms in the older age-group, in which decreases were more common at high prevalence. For both age-groups, more centres showed increases in all three disorders more often than showing decreases, but most centres had mixed changes. The rise in prevalence of symptoms in many centres is concerning, but the absence of increases in prevalence of asthma symptoms for centres with existing high prevalence in the older age-group is reassuring. The divergent trends in prevalence of symptoms of allergic diseases form the basis for further research into the causes of such disorders.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0140-6736
1474-547X
1474-547X
DOI:10.1016/S0140-6736(06)69283-0