Dichlorodiphenyldichloroethane burden and breast cancer risk: a meta-analysis of the epidemiologic evidence.

We were not able to find heterogeneity according to the study design, except for a borderline significant result within retrospective population-based case-control studies (2 = 11.23; df = 5; p = 0.047).

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(2000) 0 Consistent with the prohibition against DDT, which took place between 1972 and 1997 in many countries, a decreasing trend in p,p-DDE levels is observed when considering the year of biologic sample collection, with one exception (Romieu et al. 2000), a study that reported p,p-DDE levels about 5-fold higher than the ones previously observed in the same area and a similar study population (Lopez-Carrillo et al. 1997).

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