3 Citations (Scopus)


The association between early daycare attendance and risk of allergic diseases remains inconclusive. Therefore, we examined the association among Japanese children on a long-term basis using a nationwide longitudinal survey data. We estimated the association between daycare attendance at age 6 or 18 months and allergy development using information on outpatient visits for atopic dermatitis (AD), food allergy (FA), and asthma and admission for asthma up to 12 years of age as a proxy for developing these diseases, with multilevel logistic regression. Early daycare attendance was associated with increased odds of AD at ages 2.5–3.5 years: the adjusted odds ratio (OR) was 1.34 [95% CI: 1.21, 1.47]. The association with FA was equivocal. The odds of asthma was increased before age 3.5 years and afterwards decreased: the adjusted ORs were 1.60 [1.44, 1.77] for ages 1.5–2.5 years and 0.77 [0.69, 0.87] for ages 5.5–7 years. The effect of early daycare attendance depends on the type of allergies.

Original languageEnglish
Pages (from-to)18-26
Number of pages9
JournalArchives of Environmental and Occupational Health
Issue number1
Publication statusPublished - Jan 2 2020


  • Allergies
  • asthma
  • children
  • epidemiology
  • exposure assessment
  • hygiene hypothesis

ASJC Scopus subject areas

  • Toxicology
  • Environmental Science(all)
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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