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The magnitude of the effect of smaller family sizes on the increase in the prevalence of asthma and hay fever in the United Kingdom and New Zealand.
J Allergy Clin Immunol. 1999 Sep; 104(3 Pt 1):554-8.JA

Abstract

BACKGROUND

Declining family size is one factor that has been proposed to contribute to increasing asthma and hay fever prevalence, but its relative importance has not been quantified.

OBJECTIVE

Our purpose was to determine the change in asthma and hay fever prevalence that would be expected from the reduction in family size that has occurred in England/Wales and New Zealand over recent decades.

METHODS

The relative change in family size between 1961 and 1991 in England/Wales and New Zealand was determined from census data for these years. Summary weighted odds ratios were calculated for the associations among birth order, family size, and asthma and hay fever prevalence. The expected increase in the prevalence of asthma and hay fever between 1961 and 1991 resulting from changes in family size was then calculated.

RESULTS

The expected relative increase in the prevalence of asthma between 1961 and 1991 as a result of the smaller family size was 1% and 5% for England/Wales and New Zealand, respectively; smaller family size would be expected to increase the prevalence of hay fever prevalence in England/Wales by 4%.

CONCLUSIONS

Changes in family size over the last 30 years do not appear to explain much of the reported increase in asthma or hay fever prevalence. The contribution that other risk factors have made to these increases could be assessed with use of a similar approach.

Authors+Show Affiliations

Wellington Asthma Research Group, Department of Medicine, Wellington School of Medicine, Wellington, New Zealand.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

10482827

Citation

Wickens, K, et al. "The Magnitude of the Effect of Smaller Family Sizes On the Increase in the Prevalence of Asthma and Hay Fever in the United Kingdom and New Zealand." The Journal of Allergy and Clinical Immunology, vol. 104, no. 3 Pt 1, 1999, pp. 554-8.
Wickens K, Crane J, Pearce N, et al. The magnitude of the effect of smaller family sizes on the increase in the prevalence of asthma and hay fever in the United Kingdom and New Zealand. J Allergy Clin Immunol. 1999;104(3 Pt 1):554-8.
Wickens, K., Crane, J., Pearce, N., & Beasley, R. (1999). The magnitude of the effect of smaller family sizes on the increase in the prevalence of asthma and hay fever in the United Kingdom and New Zealand. The Journal of Allergy and Clinical Immunology, 104(3 Pt 1), 554-8.
Wickens K, et al. The Magnitude of the Effect of Smaller Family Sizes On the Increase in the Prevalence of Asthma and Hay Fever in the United Kingdom and New Zealand. J Allergy Clin Immunol. 1999;104(3 Pt 1):554-8. PubMed PMID: 10482827.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The magnitude of the effect of smaller family sizes on the increase in the prevalence of asthma and hay fever in the United Kingdom and New Zealand. AU - Wickens,K, AU - Crane,J, AU - Pearce,N, AU - Beasley,R, PY - 1999/9/14/pubmed PY - 1999/9/14/medline PY - 1999/9/14/entrez SP - 554 EP - 8 JF - The Journal of allergy and clinical immunology JO - J Allergy Clin Immunol VL - 104 IS - 3 Pt 1 N2 - BACKGROUND: Declining family size is one factor that has been proposed to contribute to increasing asthma and hay fever prevalence, but its relative importance has not been quantified. OBJECTIVE: Our purpose was to determine the change in asthma and hay fever prevalence that would be expected from the reduction in family size that has occurred in England/Wales and New Zealand over recent decades. METHODS: The relative change in family size between 1961 and 1991 in England/Wales and New Zealand was determined from census data for these years. Summary weighted odds ratios were calculated for the associations among birth order, family size, and asthma and hay fever prevalence. The expected increase in the prevalence of asthma and hay fever between 1961 and 1991 resulting from changes in family size was then calculated. RESULTS: The expected relative increase in the prevalence of asthma between 1961 and 1991 as a result of the smaller family size was 1% and 5% for England/Wales and New Zealand, respectively; smaller family size would be expected to increase the prevalence of hay fever prevalence in England/Wales by 4%. CONCLUSIONS: Changes in family size over the last 30 years do not appear to explain much of the reported increase in asthma or hay fever prevalence. The contribution that other risk factors have made to these increases could be assessed with use of a similar approach. SN - 0091-6749 UR - https://www.unboundmedicine.com/medline/citation/10482827/The_magnitude_of_the_effect_of_smaller_family_sizes_on_the_increase_in_the_prevalence_of_asthma_and_hay_fever_in_the_United_Kingdom_and_New_Zealand_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0091-6749(99)70323-4 DB - PRIME DP - Unbound Medicine ER -