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Weighted proportions of dual user subgroups accounting for low and high biomarker concentrations for total nicotine equivalents††, tobacco-specific nitrosamine NNK††, lead, cadmium, naphthalene, pyrene, acrylonitrile††, acrolein, and acrylamide (n = 792). ††An estimate of the precision has been made, however it and the estimated statistic may not be valid due to skewness in the data. The analytic sample size varies based on the specific biomarker (range: 761–792).
