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Confounders and confusion: Dealing with cancer cases of occupational origin
Paolo Crosignani1, Plinio Amendola, Alessandra Scaburri
1Fondazione IRCCS Istituto dei Tumori, Milano, Italy. occam@istitutotumori.mi.it
Background:
The recognition of occupational cancers is often hampered by confusion between the individual determinants of the disease and effects at the group level.
Methods:
Here we propose an approach, based on the evaluation of the attributable risk at the group level, that provides quantitative estimates of the roles of multiple causes in individuals affected of cancer within a population exposed to occupational risk.
Results:
The estimate of individual probability can be easily obtained computing the attributable risk. This can be often achieved by using the existing information available in the literature.
Conclusions:
Dismissing the occupation as a cause of a cancer in an exposed subject on the sole basis of potential confounding is erroneous and should be withdrawn from medical practice.
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