PFAS mixture exposure shows positive association with serum total IgE levels in Korean adults

This cross-sectional analysis used data from 2,987 Korean adults participating in the Korean National Environmental Health Survey cycle 4 (2018–2020). It examined the relationship between concurrent exposure to a mixture of five perfluoroalkyl substance (PFAS) congeners and serum total immunoglobulin E (IgE) levels. No comparator group was explicitly reported in the input data.

The analysis found a statistically significant positive association between the overall PFAS mixture and total IgE levels (β = 0.033, p = 0.026). Perfluorodecanoic acid (PFDeA) was identified as the major contributor within the mixture, exhibiting a J-shaped, non-linear dose-response relationship with IgE levels (Pnon-linear < 0.001). The study also reported a significant interaction between PFAS exposure and smoking status (p < 0.05), though the specific direction of this interaction was not detailed.

Safety and tolerability data for PFAS exposure were not reported in the provided information. The primary limitation is the cross-sectional study design, which captures exposure and outcome at a single time point and cannot determine temporal sequence or establish causality. The findings represent an association, not evidence of causation. Funding sources and potential conflicts of interest were not reported. The practice relevance of these findings for clinicians is not specified, but they contribute to the observational evidence base on environmental chemical exposures and immune markers.