Prevalence and Risk Factors of Fluid Overload in Southern Chinese Continuous Ambulatory Peritoneal Dialysis Patients

by Qunying Guo, Chunyan Yi, Jianying Li, Xiaofeng Wu, Xiao Yang, Xueqing Yu

Background

Fluid overload is frequently present in CAPD patients and one of important predictors of mortality. The aim of this study is to investigate the prevalence and associated risk factors in a cohort study of Southern Chinese CAPD patients.

Methods

The patients (receiving CAPD 3 months and more) in our center were investigated from January 1, 2008 to December 31, 2009. Multi-frequency bioelectrical impedance analysis was used to assess the patient?s body composition and fluid status.

Results

A total of 307 CAPD patients (43% male, mean age 47.8?15.3 years) were enrolled, with a median duration of PD 14.6 (5.9?30.9) months. Fluid overload (defined by Extracellular water/Total body water (ECW/TBW)?0.40) was present in 205 (66.8%) patients. Univariate analysis indicated that ECW/TBW were inversely associated with body mass index (r?=??0.11, P?=?0.047), subjective global assessment score (r?=??0.11, P?=?0.004), body fat mass (r?=??0.15, P?=?0.05), serum albumin (r?=??0.32, PP?=?0.02), potassium (r?=??0.15, P?=?0.02), and residual urine output (r?=??0.14, P?=?0.01), positively associated with age (r?=?0.27, PPPPP?=?0.033), old age (??=?0.268, PP?=?0.006), less residual urine output (??=??0.116, P?=?0.042), and lower serum potassium (??=??0.126, P?=?0.03) were independently associated with higher ECW/TBW. After 1 year of follow-up, the cardiac event rate was significantly higher in the patients with fluid overload (17.1% vs 6.9%, P?=?0.023) than that of the normal hydrated patients.

Conclusions

The prevalence of fluid overload was high in CAPD patients. Fluid overload in CAPD patients were independently associated with protein-energy wasting, old age, and decreased residual urine output. Furthermore, CAPD patients with fluid overload had higher cardiac event rate than that of normal hydrated patents.

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Prevalence and Risk Factors of Fluid Overload in Southern Chinese Continuous Ambulatory Peritoneal Dialysis Patients
Syndicated from:PLoS ONE

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