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Inicio Allergologia et Immunopathologia Duration of exclusive breastfeeding and wheezing in the first year of life: A lo...
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Vol. 45. Issue 4.
Pages 316-324 (July - August 2017)
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Vol. 45. Issue 4.
Pages 316-324 (July - August 2017)
Original Article
DOI: 10.1016/j.aller.2016.08.013
Duration of exclusive breastfeeding and wheezing in the first year of life: A longitudinal study
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Elvira Verducia,b, Giuseppe Banderalib, Diego Peronic, Carlotta Lassandroa,b,d, Giovanni Radaellia,b,
Corresponding author
giovanni.radaelli@unimi.it

Corresponding author.
a Department of Health Sciences, University of Milan, Milan, Italy
b Department of Paediatrics, San Paolo Hospital, University of Milan, Milan, Italy
c Department of Clinical and Experimental Medicine, Section of Paediatrics, University of Pisa, Pisa, Italy
d PhD School in Nutritional Sciences, University of Milano, Milan, Italy
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Tables (4)
Table 1. Socio-demographic characteristics and medical history of mother–infants pairs in no wheezing and wheezing ever infants. Values are number (%) of observations.
Table 2. Rates (%) of wheezing during the first 12 months of life by duration of exclusive breastfeeding and of any breastfeeding.
Table 3. Univariate odds ratios (ORs) and 95% confidence intervals (CIs) of duration of exclusive breastfeeding and of any breastfeeding for wheezing ever, occasional wheezing, and recurrent wheezing at 12 months of age.
Table 4. Variables independently associated with wheezing ever, occasional wheezing and recurrent wheezing at 12 months of age. Multivariate logistic regression analysis.a
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Abstract
Introduction

Wheezing is the most common symptom associated with asthma in young children. There is a lack of well-designed prospective studies on the relationship of exclusive breastfeeding with wheezing in infants. This prospective cohort study investigated whether a relationship exists of exclusive breastfeeding with wheezing at 12 months of age.

Materials and methods

A series of 1632 mother–infant pairs were sequentially recruited. Mothers were trained at hospital on breastfeeding practices and how to recognise wheezing. At hospital discharge they received a calendar-diary to record the date at stopping breastfeeding and at onset of wheezing. Data were collected by telephone interviews through 12 months post-delivery. Breastfeeding was in accordance with the World Health Organisation and wheezing with the International Classification of Diseases (ICD-10-CM code R06.2).

Results

At 12 months 1522 mother–infant pairs were participating. Breastfeeding started in 95.9% of them and was exclusive in 86.1%. The incidence of wheezing ever and recurrent wheezing at 12 months of age was 33.7% and 10.0%, respectively. Duration of exclusive breastfeeding was shorter in wheezing than non-wheezing infants (median 2.6 months vs. 4.1 months, P<0.001). After adjustment for confounders each month of exclusive breastfeeding reduced the risk of wheezing ever by 11% and of recurrent wheezing by 15%, at 12 months of age.

Conclusion

Longer duration of exclusive breastfeeding reduces the risk of wheezing throughout the first 12 months of life. These findings would be relevant to all healthcare operators and mothers, also to improve their awareness about the best feeding practices for the infant's health.

Keywords:
Breastfeeding
Exclusive breastfeeding
Wheezing
Recurrent wheezing
Asthma
Infants

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