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A Low Serum Bicarbonate Concentration as a Risk Factor for Mortality in Peritoneal Dialysis Patients

Authors
 Tae Ik Chang  ;  Hyung Jung Oh  ;  Ea Wha Kang  ;  Tae-Hyun Yoo  ;  Sug Kyun Shin  ;  Shin-Wook Kang  ;  Kyu Hun Choi  ;  Dae Suk Han  ;  Seung Hyeok Han 
Citation
 PLOS ONE, Vol.8(12) : e82912, 2013 
Journal Title
 PLOS ONE 
Issue Date
2013
MeSH
Adult ; Aged ; Bicarbonates/blood* ; C-Reactive Protein/metabolism ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Peritoneal Dialysis/mortality* ; Renal Insufficiency, Chronic/blood* ; Renal Insufficiency, Chronic/mortality* ; Risk Factors ; Serum Albumin/metabolism
Keywords
Adult ; Aged ; Bicarbonates/blood* ; C-Reactive Protein/metabolism ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Peritoneal Dialysis/mortality* ; Renal Insufficiency, Chronic/blood* ; Renal Insufficiency, Chronic/mortality* ; Risk Factors ; Serum Albumin/metabolism
Abstract
BACKGROUND AND AIM: Metabolic acidosis is common in patients with chronic kidney disease and is associated with increased mortality in hemodialysis patients. However, this relationship has not yet been determined in peritoneal dialysis (PD) patients. METHODS: This prospective observational study included a total of 441 incident patients who started PD between January 2000 and December 2005. Using time-averaged serum bicarbonate (TA-Bic) levels, we aimed to investigate whether a low serum bicarbonate concentration can predict mortality in these patients. RESULTS: Among the baseline parameters, serum bicarbonate level was positively associated with hemoglobin level and residual glomerular filtration rate (GFR), while it was negatively associated with albumin, C-reactive protein (CRP) levels, peritoneal Kt/V urea, and normalized protein catabolic rate (nPCR) in a multivariable linear regression analysis. During a median follow-up of 34.8 months, 149 deaths were recorded. After adjustment for age, diabetes, coronary artery disease, serum albumin, ferritin, CRP, residual GFR, peritoneal Kt/V urea, nPCR, and percentage of lean body mass, TA-Bic level was associated with a significantly decreased risk of mortality (HR per 1 mEq/L increase, 0.83; 95% CI, 0.76-0.91; p < 0.001). In addition, compared to patients with a TA-Bic level of 24-26 mEq/L, those with a TA-Bic level < 22 and between 22-24 mEq/L conferred a 13.10- and 2.13-fold increased risk of death, respectively. CONCLUSIONS: This study showed that a low serum bicarbonate concentration is an independent risk factor for mortality in PD patients. This relationship between low bicarbonate levels and adverse outcome could be related to enhanced inflammation and a more rapid loss of RRF associated with metabolic acidosis. Large randomized clinical trials to correct acidosis are warranted to confirm our findings.
Files in This Item:
T201304769.pdf Download
DOI
10.1371/journal.pone.0082912
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Shin Wook(강신욱) ORCID logo https://orcid.org/0000-0002-5677-4756
Kang, Ea Wha(강이화)
Shin, Sug Kyun(신석균)
Oh, Hyung Jung(오형중)
Yoo, Tae Hyun(유태현) ORCID logo https://orcid.org/0000-0002-9183-4507
Chang, Tae Ik(장태익)
Choi, Kyu Hun(최규헌) ORCID logo https://orcid.org/0000-0003-0095-9011
Han, Dae Suk(한대석)
Han, Seung Hyeok(한승혁) ORCID logo https://orcid.org/0000-0001-7923-5635
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/88762
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