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Umbilical artery pH values at birth and risk of asthma at 5 to 6 years of age.

Author information

1
Department of Environmental Health, National Institute for Health and Welfare, Kuopio, Finland. leea.keski-nisula@kuh.fi

Abstract

BACKGROUND:

Intrapartum factors may have a role in the development of asthma and allergic diseases among offspring.

OBJECTIVE:

To investigate the association between umbilical arterial pH values at birth and asthma, allergic rhinitis, and atopic eczema in children.

METHODS:

We performed a case-control study of 222 asthmatic children and 183 control children aged 5 to 6 years with umbilical artery pH values recorded at birth. Associations were evaluated using logistic regression analysis.

RESULTS:

Asthmatic children had significantly lower umbilical artery pH values at birth than nonasthmatics, even after adjusting. Children who were born with pH values of 7.20-7.25 had a 2.62-fold (95% confidence interval [CI], 1.31-5.23) higher risk of asthma and children who were born with umbilical arterial pH values < or = 7.19 had a 3.22-fold (95% CI, 1.51-6.87) higher risk of asthma than children who were born with umbilical arterial pH values of 7.26-7.30. In contrast, children who were born with umbilical arterial pH values > or = 7.30 had a 0.41-fold lower risk of atopic eczema than children who were born with umbilical arterial pH values of 7.26-7.30. No such association was detected between umbilical artery pH values and allergic rhinitis.

CONCLUSIONS:

Stressful events at birth may play an important role in the development of asthma during early childhood. In contrast, higher umbilical arterial pH values were associated with a decreased risk of parent-reported atopic eczema at 5-6 years.

PMID:
22448454
[Indexed for MEDLINE]
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