a decreasing trendp < 0.01
In this subgroup, mean plasma indoxyl sulfate concentrations demonstrated a decreasing trend from the baseline value of 2.5 ± 0.7 μg/mL, with values of 2.1 ± 0.9 μg/mL at week 4 (p < 0.01), 2.1 ± 1.3 μg/mL at week 12 (p = 0.07), and 2.0 ± 1.1 μg/mL at week 24 (p < 0.05).