Recently, there has been a proliferation of simplified approaches to calculate the KtlVurea from pre— and postdialytic BUN measuraments in haemodialysis (HD) patients. We studied the relationship of clinical outcome parameters to KtlVurea values derived from different equations in 60 HD patients. There was statistically significant difference in the values of Kt/Vurea obtained (ranging from 0.93+021 to 1.18+0.35, p<0.0001). Although all was well correlated KtlVurea values.