Evidence map›Paper›PMID 33934363›Full record

Observational studyAllergy2021

Prevalence and early-life risk factors of school-age allergic multimorbidity: The EuroPrevall-iFAAM birth cohort.

Sigurveig T Sigurdardottir, Kristjan Jonasson, Michael Clausen, Kristin Lilja Bjornsdottir, Sigridur Erla Sigurdardottir, Graham Roberts, Kate Grimshaw, Nikolaos G Papadopoulos, Paraskevi Xepapadaki, Ana Fiandor and 18 more

Abstract readMulticenter StudyObservational Study
In one paragraph

Observational study in Allergy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

30 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Thoracoabdominal Asynchrony in Healthy Children.Journal of sleep research · 2026
    Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. A synthetic bacterial community made of human milk isolated strains is an effective strategy to prevent food allergy in a mouse model.Pediatric allergy and immunology : official publication of the European Society of Pediatric Allergy and Immunology · 2026
    Article
  10. Article
  11. Article
  12. Allergic rhinitis and asthma: drivers of otitis media and associated tympanostomy tube placement.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2025
    Article
  13. Observational
  14. Article
  15. Article
  16. Total IgE Trends in Children with Allergic Diseases.Journal of clinical medicine · 2024
    Article
  17. Article
  18. Food allergies around the world.Frontiers in nutrition · 2024
    Review
  19. Review
  20. Early Prediction of Asthma.Journal of clinical medicine · 2023
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

28 authors.

Sigurveig T SigurdardottirLandspitali University Hospital, Reykjavik, Iceland.ORCID 0000-0002-6275-0910
Kristjan JonassonDepartment of Computer Science, University of Iceland, Reykjavík, Iceland.ORCID 0000-0002-9066-3128
Michael ClausenChildren's Hospital Reykjavik, Reykjavik, Iceland.
Kristin Lilja BjornsdottirChildren's Hospital, Landspitali University Hospital, Reykjavik, Iceland.
Sigridur Erla SigurdardottirDepartment of Allergy, Landspitali University Hospital, Reykjavik, Iceland.
Graham RobertsHuman Development and Health & Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, UK.ORCID 0000-0003-2252-1248
Kate GrimshawDietetic Department, Salford Royal NHS Foundation Trust, UK.
Nikolaos G PapadopoulosAllergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece.ORCID 0000-0002-4448-3468
Paraskevi XepapadakiAllergy Department, 2nd Pediatric Clinic, National and Kapodistrian University of Athens, Athens, Greece.ORCID 0000-0001-9204-1923
Ana FiandorDepartment of Allergy, La Paz University Hospital, IdiPAZ, Madrid, Spain.
Santiago QuirceDepartment of Allergy, La Paz University Hospital, IdiPAZ, Madrid, Spain.
Aline B SprikkelmanDepartment of Pediatric Pulmonology and Pediatric Allergology, University Medical Center Groningen, University of Groningen, The Netherlands.
Lies HulshofDepartment of Pediatric Pulmonology and Pediatric Allergology, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Marek L KowalskiDepartment of Immunology, Allergy and Rheumatology, Medical University of Lodz, Lodz, Poland.ORCID 0000-0002-8442-2774
Marcin KurowskiDepartment of Immunology, Allergy and Rheumatology, Medical University of Lodz, Lodz, Poland.
Ruta DubakieneMedical Faculty Clinic of Chest Diseases, Allergology and Immunology, Vilnius University, Vilnius, Lithuania.
Odilija RudzevicieneFaculty of Medicine Clinic of Children's Diseases, Vilnius University, Vilnius, Lithuania.
Johanna BellachDepartment of Paediatric Pneumology and Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Songül YürekDepartment of Paediatric Pneumology and Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Andreas ReichEpidemiology Unit, German Rheumatism Research Centre, Berlin, Germany.
Sina Maria ErhardInstitute of Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Philip CouchCentre for Health Informatics, School of Health Sciences, The University of Manchester, Manchester, UK.
Montserrat Fernandez RivasAllergy Department, Hospital Clinico San Carlos, Universidad Complutense, IdISSC, ARADyAl, Madrid, Spain.
Ronald van ReeDepartments of Experimental Immunology and of Otorhinolaryngology, Amsterdam University Medical Centers, Amsterdam, The Netherlands.
Clare MillsInstitute of Inflammation and Repair, University of Manchester, Manchester, UK.
Linus GrabenhenrichDepartment for Infectious Disease Epidemiology, Robert Koch-Institut, Berlin, Germany.ORCID 0000-0002-9300-6625
Kirsten BeyerDepartment of Paediatric Pneumology and Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Thomas KeilInstitute of Social Medicine, Epidemiology and Health Economics, Charité - Universitätsmedizin Berlin, Berlin, Germany.ORCID 0000-0002-9108-3360

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundCoexistence of childhood asthma, eczema and allergic rhinitis is higher than can be expected by chance, suggesting a common mechanism. Data on allergic multimorbidity from a pan-European, population-based birth cohort study have been lacking. This study compares the prevalence and early-life risk factors of these diseases in European primary school children.

methodsIn the prospective multicentre observational EuroPrevall-iFAAM birth cohort study, we used standardized questionnaires on sociodemographics, medical history, parental allergies and lifestyle, and environmental exposures at birth, 12 and 24 months. At primary school age, parents answered ISAAC-based questions on current asthma, rhinitis and eczema. Allergic multimorbidity was defined as the coexistence of at least two of these.

resultsFrom 10,563 children recruited at birth in 8 study centres, we included data from 5,572 children (mean age 8.2 years; 51.8% boys). Prevalence estimates were as follows: asthma, 8.1%; allergic rhinitis, 13.3%; and eczema, 12.0%. Allergic multimorbidity was seen in 7.0% of the whole cohort, ranging from 1.2% (Athens, Greece) to 10.9% (Madrid, Spain). Risk factors for allergic multimorbidity, identified with AICc, included family-allergy-score, odds ratio (OR) 1.50 (95% CI 1.32-1.70) per standard deviation; early-life allergy symptoms, OR 2.72 (2.34-3.16) for each symptom; and caesarean birth, OR 1.35 (1.04-1.76). Female gender, OR 0.72 (0.58-0.90); older siblings, OR 0.79 (0.63-0.99); and day care, OR 0.81 (0.63-1.06) were protective factors.

conclusionAllergic multimorbidity should be regarded as an important chronic childhood disease in Europe. Some of the associated early-life factors are modifiable and may be considered for prevention strategies.

Indexed as

EczemaRhinitis, AllergicChildCohort StudiesFemaleHumansInfant, NewbornMaleMultimorbidityPregnancyPrevalenceProspective StudiesRisk FactorsSchoolsSurveys and Questionnairesallergic multimorbidityallergic rhinitisasthmachildreneczema

Identifiers

PMID33934363
PMCPMC8453757

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.