fig4
![Exogenous factors associated with legacy PFAS concentrations in the general U.S. population: NHANES 1999-2018](https://image.oaes.cc/a7c59535-5394-45b4-823e-b77a1f6bc2b7/wecn3005.fig.4.jpg)
Figure 4. Change in serum PFNA relative to the reference level (for categorical variables) or per unit SD increase for continuous covariates from multivariable mixed-effects regression. See Supplementary Table 2 for details. Blue indicates statistically significant findings, while orange indicates findings that are not statistically significant. PFNA: Perfluorononanoic acid.