fig3

Figure 3. Bivariate exposure-response functions for individual OPE metabolite concentrations with sleep duration (A) and sleep problems (B) at different quartiles (25th, 50th, and 75th) of a second OPE metabolite, while all other OPE metabolites were fixed at their median levels, based on BKMR analysis. The model was adjusted for covariates including age, sex, race, education, BMI, marital status, alcohol status, smoking status, and PIR. OPE: Organophosphate ester; BKMR: Bayesian kernel machine regression; BMI: body mass index; PIR: poverty-income ratio; BCEP: bis(2-chloroethyl) phosphate; BCPP: bis(1-chloro-2-propyl) phosphate; BDCPP: bis(1,3-dichloro-2-propyl) phosphate; DBUP: dibutyl phosphate; DPHP: diphenyl phosphate.