Steven Stellman - Parakeets, canaries, finches, parrots and lung cancer: no association

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      Publication Details (including relevant citation   information):

      Morabia, A., Stellman, S., Lumey, L. H., Wynder, E. L.   77 (3) 501-4-

      Abstract: The relationship between pet bird   keeping and lung cancer according to exposure to tobacco smoking   was investigated in a case-control study in hospitals of New York   City and Washington, DC, USA. Newly diagnosed lung cancer cases   (n = 887) aged 40-79 years were compared with 1350 controls with   diseases not related to smoking, of the same age, gender and date   of admission as the cases. The prevalence of pet bird keeping was   12.5% in men and 19.1% in women. There was no association between   ever keeping a pet bird and lung cancer in never smokers (men   adjusted odds ratio (OR) = 0.70, 95% confidence interval (CI)   0.15-3.17; women, 1.32, 95% CI 0.65-2.70), or in smokers and   non-smokers combined, after adjustment for ever smoking (men:   1.28, 95% CI 0.88-1.86; women: 1.17, 95% CI 0.83-1.64; all: 1.21,   95% CI 0.95-1.56). Risk did not increase in relation to duration   of pet bird keeping. Cases and controls kept similar types of   birds. There was a tenfold increase of lung cancer risk   associated with smoking among non-bird keepers (adjusted OR =   9.15). There was no indication of a synergism, either additive or   multiplicative, between smoking and pet bird keeping with respect   to lung cancer risk. Either alone or in conjunction with smoking,   keeping parakeets, canaries, finches or parrots is not a risk   factor for lung cancer among hospital patients in New York and in   Washington, DC.

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