Fig. 2

The correlation between eGFR and mean thresholds at low- (a), mid-(b), and high-(c) frequency ranges. All of the three groups had meaningful negative correlations with eGFR values (all p < 0.001)
The correlation between eGFR and mean thresholds at low- (a), mid-(b), and high-(c) frequency ranges. All of the three groups had meaningful negative correlations with eGFR values (all p < 0.001)