The peritoneal equilibration test (PET) is a common test used in the adequacy of peritoneal dialysis (PD).To determine the frequency of presentation of different types of peritoneal transport in patients on PD ranking with Twardowski, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ) and Hospital de Especialidades del Instituto Mexicano del Seguro Social Centro Médico Nacional de Occidente (IMSS-HE, CMNO) and establish themselves.Descriptive and transversal study. Included with PET on PD patients between April 2011 to September 2012; any gender, 16 years or older, in DP minimum of 4 weeks. PEP performed standardized bags of 2.5%.Performed 235 PET. We can classify peritoneal transport with Twardowski in high (H) 34%, high average (HA) 37%, low average (LA) 25%, and low (L) 4% peritoneal transport rates. INCMNSZ percentages H was 34%, HA 32%, LA 23%, and L 11%; using the CMNO HE was H 26%, HA 31%, LA 31%, and L 12%. From our data, the percentage of patients with H was 22%, HA 33%, LA 32%, and L13%.Classifying patients according to type of transport with Twardowski will under-diagnose the low and overestimate high transport, and can alter survival forecasts.