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Published on: August 7, 2017
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.
Background:
Association of early pregnancy body mass index (BMI) and maternal gestational weight gain (GWG), and asthma and allergic disease in children is unclear.
Methods:
We analyzed data from 3176 mother-child pairs in a prospective birth cohort study. Maternal anthropometric measurements in the first and last antenatal clinic visits were obtained through post-delivery questionnaires to calculate early pregnancy BMI and maternal GWG. Asthma and allergic diseases in children by the age of 5 years was assessed using a validated questionnaire. Furthermore, serum samples were analyzed for IgE antibodies to eight allergens. We applied Cox proportional hazards and logistic regression analyses to estimate the association of early pregnancy BMI and maternal GWG (as continuous variables and categorized into quarters), and asthma, atopic eczema, atopic sensitization, and allergic rhinitis in children.
Results:
Neither early pregnancy BMI nor maternal GWG was associated with asthma and allergic disease in children when analyzed as continuous variables. However, compared to the first quarter of GWG (a rate <0.32 kg/week), mothers in the third quarter (rate 0.42-0.52 kg/week) had children with significantly higher odds of developing atopic eczema (adjusted OR 1.49, 95% CI [1.13-1.96]) by 5 years of age.
Conclusion:
Association of early pregnancy BMI and maternal GWG, and asthma and allergic disease in children, is inconsistent. High maternal GWG may be associated with increased odds of atopic eczema.
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