Plasma Levels of Polychlorinated Biphenyls, Non-Hodgkin Lymphoma, and Causation
Table 2
Summary of published cohort studies examining mortality from NHL as associated with PCB exposure. Note the cohort described in Prince et al., [50] were included in the Prince et al., [51] study. Here, the standardized mortality ratio (SMR) was calculated as an indirect adjustment method where the observed number of events (deaths) in each occupational cohort is compared with the number of expected events (based on a βstandardβ rate).