Washington: Cesarean or C-section delivery, particularly potentially avoidable unplanned cesarean sections, elevate asthma risk in children.
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However, it doesn’t increase the risk of other immune-mediated disorders previously associated with C-sections, according to the research published by VATT Institute for Economic Research.
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For the study, researchers used novel statistical methods and followed the health of more than 1.4 million Finnish children from birth to teenage years.
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The focus was on the common chronic conditions that have previously been associated with C-sections: asthma and other atopic diseases, type 1 diabetes, and obesity.
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“The results suggest that C-section increases the risk of asthma from early childhood. However, we didn’t find a causal relationship between C-section and diseases previously linked to it, such as allergies, type 1 diabetes and obesity,” said Ana Rodriguez from Pompeu Fabra University.
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The researcher added, “These findings suggest that the effect of C-sections on the development of the immune system is more complex than previously assumed.”
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Simple comparisons between babies born by C-section and vaginal delivery are likely to yield misleading conclusions because it is difficult to separate the effect of C-sections from other differences between these two groups.
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To solve this problem, the researchers used a novel research design to estimate the causal impact of C-sections.
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The researches documented, based on Finnish administrative data, that physicians perform more unplanned C-sections during days that precede a weekend or public holiday.
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“In these cases prolonged labor was frequently the reason for the C-section. The data shows that during the days preceding a public holiday, physicians make greater use of more discretionary diagnoses as justification for the C-section,” said Lauri Saaksvuori from the Finnish Institute for Health and Welfare and VATT Institute for Economic Research.
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Researchers also used comparisons between siblings born by different birth modes to verify their findings and better understand the causal effect of cesarean sections.
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