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Household contact with pets and birds and risk of lymphoma

Bellizzi, Saverio and Cocco, Pierluigi and Zucca, Mariagrazia and D'Andrea, Ileana and Sesler, Simonetta and Monne, Maria and Onida, Angela and Piras, Giovanna and Uras, Antonella and Angelucci, Emanuele and Gabbas, Attilio and Rais, Marco and Nitsch, Dorothea and Ennas, Maria Grazia (2011) Household contact with pets and birds and risk of lymphoma. Cancer Causes and Control, Vol. 22 (2), p. 159-165. ISSN 0957-5243. eISSN 1573-7225. Article.

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DOI: 10.1007/s10552-010-9661-z

Abstract

Background Contact with household pets has been suggested to be inversely associated with lymphoma risk.
Methods We tested the hypothesis in a case–control study of lymphoma in the Sardinia region of Italy. Cases were 326 patients, first diagnosed with lymphoma in 1999–2003. Controls were 464 population controls, frequency matched to cases by age, gender, and area of residence. In person interviews included self-reported household contact with pets and birds, type of pet(s), and age at starting contact.
Results Frequent contact with birds was inversely associated with lymphoma, and particularly B-cell non-Hodgkin lymphoma (odds ratio [OR] = 0.6, 95% confidence interval [95% CI]: 0.4, 0.9). Contact with chickens accounted for this inverse association, which was strongest for first contact occurring at age <8 years (OR = 0.4, 95% CI: 0.2, 1.0). No association was observed when first contact occurred at age 9 or older. Contact with any pets was inversely associated with risk of diffuse large B-cell lymphoma (OR = 0.4, 95% CI: 0.2, 1.0), but not other lymphoma subtypes.
Conclusion Our results support the hypothesis that earlylife exposure to pets, birds and particularly with chickens might be associated with a reduced risk of lymphoma.

Item Type:Article
ID Code:6125
Status:Published
Refereed:Yes
Uncontrolled Keywords:Lymphoma, epidemiology, lifestyle, animals domestic
Subjects:Area 06 - Scienze mediche > MED/08 Anatomia patologica
Divisions:001 Università di Sassari > 03 Istituti > Anatomia patologica
Publisher:Springer Netherlands
ISSN:0957-5243
eISSN:1573-7225
Copyright Holders:© Springer Science+Business Media B.V. 2010
Deposited On:09 Jun 2011 10:18

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