Environmental exposure to emissions from petrochemical sites and lung cancer: the lower Mississippi interagency cancer study.

Despite the magnitude of the odds ratio, this association did not reach statistical significance, however, due to a paucity of lung cancer cases.

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Overall, while 8 out of 14 studies found a significant association between one or more exposure indices and lung cancer, only five evaluated evidence of a dose-response relationship, with two finding a significant positive trend, one a positive trend only among smokers, one no significant trend, and one a significant negative trend.

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