Premium
Benchmark dose risk analysis with mixed‐factor quantal data in environmental risk assessment
Author(s) -
SansFuentes Maria A.,
Piegorsch Walter W.
Publication year - 2021
Publication title -
environmetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.68
H-Index - 58
eISSN - 1099-095X
pISSN - 1180-4009
DOI - 10.1002/env.2677
Subject(s) - benchmark (surveying) , confidence interval , statistics , monte carlo method , risk assessment , econometrics , mathematics , computer science , computer security , geography , geodesy
Benchmark analysis is a general risk estimation strategy for identifying the benchmark dose (BMD) past which the risk of exhibiting an adverse environmental response exceeds a fixed, target value of benchmark response. Estimation of BMD and of its lower confidence limit (BMDL) is well understood for the case of an adverse response to a single stimulus. In many environmental settings, however, one or more additional, secondary, qualitative factor(s) may collude to affect the adverse outcome, such that the risk changes with differential levels of the secondary factor. This article extends the single‐dose BMD paradigm to a mixed‐factor setting with a secondary qualitative factor possessing two levels. With focus on quantal‐response data and using a generalized linear model with a complementary‐log link function, we derive expressions for BMD and BMDL. We study the operating characteristics of six different multiplicity‐adjusted approaches to calculate the BMDL, using Monte Carlo evaluations. We illustrate the calculations via an example dataset from environmental carcinogenicity testing.