(2007) identified [PONl.sup.[192RR]] as the more susceptible group, reporting stronger negative associations between diethyl alkyl phosphate (DEAP) metabolites and birth weight, and between dimethyl alkyl phosphate (DMAP) metabo lites and birth length, in mothers with the [PONl.sup.[192RR]] genotype (compared with those with QQ genotype).
All mothers had detectable levels of at least one DMAP metabolite, and at least one DEAP metabolite was detected in 92.7% of women.
DMAP metabolites were much more abundant in our study samples, and their associations were typically stronger than the DEAP metabolite associations.