highly significantp < 0.0001
The main effect of PFOA accounted for 33.97% of the variance and was highly significant ( p < 0.0001, F = 56.36, DFn = 2, DFd = 18), whereas DBP alone explained only 4.28% of the variance, although this effect was also statistically significant ( p < 0.0001, F = 7.10, DFn = 2, DFd = 18). 3.8.