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Does birth season influence the odds for asthma? Large cohort analysis
Shmuel Goldberg1, Avital Stein1, Elie Picard1
1Department of Pediatrics, Institute of Pediatric Pulmonary Medicine, Shaare Zedek Medical Center, Jerusalem, Israel.
Pediatric Pulmonology
|February 8, 2020
Summary
Asthma risk is higher for individuals born in summer, particularly June, compared to those born in winter. This large study focused on adolescents and found seasonal birth patterns influence asthma prevalence.
Area of Science:
- Epidemiology
- Environmental Health
- Allergy and Immunology
Background:
- Limited research exists on the link between birth season and asthma risk, with prior studies yielding inconsistent results.
- Previous investigations primarily focused on young children, necessitating further research in adolescent populations.
Purpose of the Study:
- To investigate the association between season of birth and asthma risk in a large adolescent cohort.
- To clarify conflicting findings from earlier studies on birth season and asthma prevalence.
Main Methods:
- Retrospective review of medical records for 17-year-old conscripts (born 1978-1999).
- Analysis of asthma prevalence based on birth season and gender.
- Inclusion of over 10 million individuals in the study cohort.
Main Results:
- Overall asthma prevalence was 6.6% in males and 5.8% in females.
- Summer births showed a higher asthma prevalence (approx. 9% in females, 6% in males) compared to winter births.
- Winter births had the lowest asthma prevalence; June and September were identified as high-risk birth months.
Conclusions:
- Summer birth, especially in June, is linked to increased asthma risk in Israeli adolescents.
- Further research is needed to explore the impact of birth season on asthma risk in vulnerable populations.
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