An analysis of the relationship of blood pressure and its variability with residual kidney function loss in hemodialysis patients.

Aims: This study aims to investigate the relationship of blood pressure (BP) and systolic BP (SBP) variability with residual kidney function (RKF) loss in hemodialysis (HD) patients.

Materials and methods: The demographic and clinical information and data on RKF loss events in HD patients were collected. The baseline characteristics of the patients were compared among groups according to pre- and postdialysis SBP (< 120, 120 - 139, 140 - 159, and ≥ 160 mmHg) and diastolic BP (DBP) (< 80, 80 - 89, 90 - 99, and ≥ 1 00 mmHg). Participants were divided into two groups based on the mean intradialytic and interdialytic SBP variability. Kaplan-Meier analysis and Cox regression analysis were used to evaluate the risk of RKF loss.

Results: A total of 157 participants with an average HD vintage of 35.97 months were included. The group with the lowest predialysis SBP showed the longest duration of residual urine. However, Kaplan-Meier analysis and Cox regression analysis indicated that BP and SBP variability were not independent risk factors for RKF loss. Higher serum albumin levels showed protective effects against RKF loss, and diabetes mellitus (DM) and higher serum calcium were the independent risk factors for RKF loss.

Conclusion: BP and SBP variability were not independent risk factors for RKF loss in HD patients. DM, serum albumin, and calcium were independent factors related to RKF loss.