It was VAT volume predict patient outcome, while VAT density predicted baseline membrane function in PD patients and reflected peritoneal vascular density and local inflammation status.

Inclusion Criteria:

• The study included peritoneal dialysis patients follow up in our center who had an abdominal CT scan within 2 weeks before PD catheter incubation.

Exclusion Criteria:

• Those with acute inflammation according to clinical signs, lab results or abdominal CT scan were excluded from the cohort.

The study included peritoneal dialysis patients follow up in our center who had an abdominal CT scan within 2 weeks before PD catheter incubation. Those with acute inflammation according to clinical signs, lab results or abdominal CT scan were excluded from the cohort. In early years, abdominal CT scan was done if the patient reported history of abdominal abnormalities, such as history of cholelithiasis. Since 2020 it became a routine check before PD catheter incubation in our center. Those with cholelithiasis or hernia were suggested to had the preventive operation at the time of PD catheter incubation under general anesthesia. The patients started PD within 4 weeks after catheter incubation. A validation cohort was from a satellite center of the hospital. The inclusion criteria were same as the derivation cohort.