Adipose tissue levels of organochlorine pesticides and polychlorinated biphenyls and risk of non-Hodgkin's lymphoma.

For all residues, the mean was higher in cases than in controls, and levels were sig- nificantly higher for dieldrin, oxychlordane, heptachlor epoxide, and hexachlorobenzene by Wilcoxon rank sum test (Table 2). Table 3 shows results of conditional logis- tic regression models for individual pesticides. p,p-DDT was not significantly increased among cases when divided into quartiles, but there was a significant trend for the log- transformed continuous variable (p < 0.05).

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