Early-pregnancy BMI, maternal gestational weight gain, and asthma and allergic diseases in children

Vincent Ojwang'1,2,3, Bright I Nwaru1,4,5, Takkinen Hanna-Mari1,6,7

  • 1Faculty of Social Sciences, Health Sciences Unit, Tampere University, Tampere, Finland.

Insights

Maternal gestational weight gain (GWG) in early pregnancy may increase a child's risk for atopic eczema. However, neither early pregnancy body mass index (BMI) nor GWG showed a clear link to childhood asthma or other allergic diseases.

Area of Science:

  • Obstetrics and Gynecology
  • Pediatric Allergy and Immunology
  • Public Health

Background:

  • The relationship between early pregnancy body mass index (BMI) and maternal gestational weight gain (GWG) with childhood asthma and allergic diseases remains unclear.
  • Existing research presents inconsistent findings, necessitating further investigation into these associations.

Purpose of the Study:

  • To investigate the association between early pregnancy BMI and GWG with the incidence of asthma and allergic diseases in children up to 5 years of age.
  • To explore the potential link between maternal weight management during pregnancy and the development of allergic conditions in offspring.

Main Methods:

  • Analysis of data from a prospective birth cohort study involving 3176 mother-child pairs.
  • Calculation of early pregnancy BMI and GWG using maternal anthropometric measurements.
  • Assessment of childhood asthma and allergic diseases (atopic eczema, atopic sensitization, allergic rhinitis) via validated questionnaires and IgE antibody analysis by age 5.
  • Application of Cox proportional hazards and logistic regression models to determine associations.

Main Results:

  • No significant association was found between early pregnancy BMI or GWG (as continuous variables) and childhood asthma or allergic diseases.
  • However, a significantly higher odds of developing atopic eczema by age 5 was observed in children whose mothers were in the third quarter of GWG compared to the first quarter (adjusted OR 1.49, 95% CI [1.13-1.96]).

Conclusions:

  • The association between early pregnancy BMI, GWG, and childhood asthma and allergic diseases is inconsistent.
  • Elevated maternal GWG, particularly in the third trimester, may be linked to an increased risk of atopic eczema in children.
Abstract

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