42 CFR § 81.25 - Guidelines for claims including two or more primary cancers.
For claims including two or more primary cancers, DOL will use NIOSH-IREP to calculate the estimated probability of causation for each cancer individually. Then DOL will perform the following calculation using the probability of causation estimates produced by NIOSH-IREP:
3 Evaluating Equation 1 based on the individual upper 99th percentiles of PC1, . . ., PCn approximates the upper 99th percentile of PCtotal whenever PC1, . . ., PCn are highly related, e.g., when a common dose-reconstruction is the only non-negligible source of uncertainty in the individual PCi's. However, this approximation can overestimate it if other sources of uncertainty contribute independently to the PC1, . . ., PCn, whereas treating the joint distribution as fully independent could substantially underestimate the upper 99th percentile of PCtotal whenever the individual PCi's are positively correlated.