a: PAH concentrations converted to BaP equivalent concentrations using toxic equivalency factors [ 24]. b: [ 34]. c: [ 33]. d: [ 35]. e: [ 37].
3. Opioids utilized by the chronic pain patients in the sampe (i.e. oxycodone, hydrocodone, methadone, fentanyl, meperidine, codeine) were converted to morphine equivalent doses using standard equivalency tables.
In addition to the ∑PCB concentration, the weighted sum of the three main mono- ortho substituted congeners CB-105, CB-118, and CB-156 was calculated using toxicity equivalency factors to obtain the dioxin equivalent concentration.
The potency of a mixture of congeners is expressed in terms of the toxic equivalency quotient (TEQ), a summed metric that weights congeners relative to the potency of TCDD using toxic equivalency factors that are established for all biologically active PCDD/Fs [ 8] and dioxin-like PCBs.
Risk assessment using toxic equivalency factors predicted substantially greater potential risk for specific congeners than for PCB mixtures.
The TEQ values can be calculated using toxic equivalency factors (TEFs) that express the toxicity of various POPs in relation to the most toxic dioxin, 2,3,7,8-tetrachlorodibenzo- p-dioxin (TEF = 1) (Van den Berg et al. 2006).
We chose not to categorize the PCBs available using toxic equivalency factors (TEFs) (Van den Berg et al. 1998), as has been done in previous analyses (e.g., Patandin et al. 1998).
For all congeners combined as toxic equivalencies (TEQ) using international toxic equivalency factors, a significant increase in cancer mortality was observed in the second quartile (360.9-1614.4 ng/kg x years, SMR 1.64; 95% Cl 1.13, 2.29) and the fourth quartile (> or = 5217.7 ng/kg x years TEQ, SMR 1.64, 95% Cl 1.13, 2.29).
Decreases in T4 were associated with dioxin equivalents using the toxic equivalency factor methodology (Desaulniers et al. 2003; Van den Berg et al. 1998).
Things such as income groups, job groups (equivalence classes of people with the same job), and surmen can all be counted using the equivalencies, without bringing surmen, job groups, and income groups into the picture.
