The reason for the strong association with workplace exposure may be due both to the length of time people spend at work and the higher levels of smoke they could be exposed to there.
Wei Zhou
We know that second-hand smoking increases the risk of lung cancer and studies have suggested that it is associated with lung cancer mortality. But this is the first study to show that second-hand smoking also is associated with lung cancer survival.
survival risk mortality study smoking cancer
people work time reason strong smoke
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