3.3. Statistical Analysis
Data were analyzed using SPSS version 13 and descriptive
statistics (frequency, percentage mean and standard deviation)
and inferential statistics (t test for comparison of
KT/V, URR and BUN in high-flux and low-flux membranes
and paired-t test for comparison of pre-dialysis and postdialysis
BUN in high-flux and low-flux membranes).
The dialysis adequacy was classified into three groups:
inadequate dialysis (KT/V ≤ 0.89, or URR ≤ 0.60); relatively
adequate dialysis (KT/V = 0.90 to 1.29 or URR = 0.61
to 0.70); and the totally adequate dialysis (KT/V ≥ 1.3, or
URR ≥ 0.70). Statistical significance was considered at P
value < 0.05.