Open AccessEcological level analysis of primary lung tumors in dogs and cats and environmental radon activity
Author(s) -
Fowler Brittany L.,
Johannes Chad M.,
O'Connor Annette,
Collins Deanna,
Lustgarten Jonathan,
Yuan Chaohui,
Weishaar Kristen,
Sullivan Kelly,
Hume Kelly R.,
Mahoney Jennifer,
Vale Brittany,
Schubert Alicia,
Ball Valerie,
CooleyLock Katie,
Curran Kaitlin M.,
Nafe Laura,
Gedney Allison,
Weatherford Megan,
LeVine Da.
Publication year - 2020
Publication title -
journal of veterinary internal medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.356
H-Index - 103
eISSN - 1939-1676
pISSN - 0891-6640
DOI - 10.1111/jvim.15936
Subject(s) - radon , cats , medicine , confidence interval , lung cancer , environmental health , veterinary medicine , quantum mechanics , physics
Background Epidemiologic studies suggest residential radon exposure might increase the risk of primary lung cancer in people, but these studies are limited by subject mobility. This limitation might be overcome by evaluating the association in pets. Hypothesis Primary pulmonary neoplasia (PPN) rate is higher in dogs and cats residing in counties with a high radon exposure risk (Environmental Protection Agency [EPA] zone 1) compared to zones 2 (moderate radon exposure risk) and 3 (low radon exposure risk). Animals Six hundred ninety client‐owned dogs and 205 client‐owned cats with PPN. Methods Retrospective review of medical records at 10 veterinary colleges identified dogs and cats diagnosed with PPN between 2010 and 2015. Each patient's radon exposure was determined by matching the patient's zip code with published county radon exposure risk. County level PPN rates were calculated using the average annual county cat and dog populations. The PPN counts per 100 000 dog/cat years at risk (PPN rates) were compared across radon zones for each species. Results The PPN rate ratio in counties in high radon zone (1) was approximately 2‐fold higher than in counties in lower radon zones for dogs (rate ratio zone 1 to 2, 2.49; 95% confidence interval [CI], 1.56‐4.00; rate ratio zone 1 to 3, 2.29; 95% CI, 1.46‐3.59) and cats (rate ratio zone 1 to 2, 2.13; 95% CI, 0.95‐4.79; zone 1 to 3, 1.81; 95% CI, 0.9‐3.61). Conclusions and Clinical Importance Exposure to household radon might play a role in development of PPN in dogs and cats.