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Forest plots for comparisons of indoxyl sulfate (IS) and p-cresyl sulfate (PCS) in serum and plasma. Sirich et al.'s, Esgalhado et al.'s and Khosroshahi 2019 et al.'s studies reported data of serum and plasma IS (a) and PCS (b) in resistant starch type 2 (RS2) and control patients under hemodialysis. Neither IS (SMD = -0.33, 95% CI, -0.70 to 0.04, I2 = 0%, P = 0.08) nor PCS (SMD = -0.31, 95% CI, -0.68 to 0.06, I2 = 0%, P = 0.10) was changed significantly after treatment with RS2.
