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 “standard” rate).

StudyPCB product exposureChlorine (%)PCB air sampling ( 𝜇 g/m3)Cohort size ( 𝑛 )DeathsCancer deathsNHL deathsMortality rate (SMR)

Prince et al., 2006 [50]Aroclor 12545424–476 & 50–1,2602,572 798 218 10 1.31
Aroclor 124242
Aroclor 101641

Prince et al., 2006 [51]Aroclor 12545424–476 & 50–1,26014,458 3,417 1015 35 0.98
Aroclor 124242
Aroclor 101641

Ruder et al., 2006 [52]Aroclor 1242427–339 & 62–2903,569 547 171 9 1.23
Aroclor 101641