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Corrigendum to "Normalised difference vegetation index and allergies among four-year-old children living in the greater Tokyo area, Japan: Findings from an Adjunct Study of the Japan Environment and Children's Study" [Int. J. Hygiene Environ. Health 275 (2026) 114812].

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Parental Age and Childhood Allergy Risk.

Kiwako Yamamoto-Hanada1, Daisuke Harama2, Miori Sato2

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Children born to older mothers show lower risks for developing food allergies, wheezing, and house dust mite sensitization. Advanced maternal age may offer protection against early childhood allergic diseases.

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Area of Science:

  • Environmental Health
  • Pediatric Allergy
  • Reproductive Epidemiology

Background:

  • Childhood allergic diseases stem from complex gene-environment interactions.
  • Advanced parental age is linked to genetic and epigenetic alterations, but its impact on childhood allergy risk is not well understood.

Purpose of the Study:

  • To investigate the association between parental age at childbirth and the risk of allergic diseases in early childhood.

Main Methods:

  • A nationwide, prospective birth cohort study (Japan Environment and Children's Study) included 34,942 mother-child pairs.
  • Physician-diagnosed allergic outcomes (food allergy, wheeze, asthma, eczema) and house dust mite (HDM) sensitization were assessed up to age 4.
  • Multivariable logistic regression with multiple imputation was used to calculate adjusted odds ratios (ORs).

Main Results:

  • Children of mothers aged 35-39 (OR, 0.79) and 40+ (OR, 0.59) had lower odds of food allergy at age 1 compared to mothers aged 25-29.
  • Children of parents both aged 35+ had lower odds of wheezing at age 4 (OR, 0.89).
  • Children of older mothers showed reduced odds of HDM sensitization (e.g., mothers 35-39: OR, 0.68).

Conclusions:

  • Advanced maternal age was associated with reduced odds of food allergy, wheezing, and HDM sensitization in early childhood.
  • These findings suggest a potentially protective effect of advanced maternal age against the development of allergic diseases in children.