Email updates

Keep up to date with the latest news and content from BMC Nephrology and BioMed Central.

Open Access Highly Accessed Research article

Association between blood cadmium levels and malnutrition in peritoneal dialysis

Ching-Wei Hsu123, Ja-Liang Lin123*, Dan-Tzu Lin-Tan123, Wen-Hung Huang123, Kuan-Hsing Chen123 and Tzung-Hai Yen123

Author Affiliations

1 Department of Nephrology and Division of Clinical Toxicology, Chang Gung Memorial Hospital, 199, Tung-Hwa North Road, Taipei, Taiwan

2 Department of Nephrology and Division of Clinical Toxicology, Lin-Kou Medical Center, Taoyuan, Taiwan

3 Chang Gung University and School of Medicine, Taipei, Taiwan

For all author emails, please log on.

BMC Nephrology 2014, 15:17  doi:10.1186/1471-2369-15-17

Published: 16 January 2014

Abstract

Background

Malnutrition is associated with an increased risk of cardiovascular death and may cause protein-energy wasting in individuals with chronic kidney disease. A previous study demonstrated that blood cadmium levels (BCLs) were associated with malnutrition in maintenance hemodialysis (MHD) patients. However, the correlation between cadmium exposure and malnutrition remains unclear in chronic peritoneal dialysis (CPD) patients. This study examined the possible adverse effects of environmental cadmium exposure in CPD patients.

Methods

A total of 301 CPD patients were enrolled and divided into 3 study groups based on the following BCL tertiles: low (<0.19 μg/L), middle (0.19–0.39 μg/L), and high (>0.39 μg/L). Demographic, hematological, biochemical, and dialysis-related data were obtained for analysis. The analysis also included values of nutritional and inflammatory markers.

Results

The BCLs of CPD patients were lower than those of MHD patients. At baseline, patients in the high BCL group were older and had a higher prevalence of diabetes mellitus but lower serum albumin, creatinine, and phosphate levels than the patients in the other 2 groups. After adjusting for potential variables, stepwise backward multiple linear regression analysis revealed that age and alanine aminotransferase levels were positively associated with logarithmic transformation of BCLs (log BCLs), while serum albumin levels were negatively associated with log BCLs in CPD patients. The log BCLs were a significant determinant (beta coefficient ± standard error = -0.185 ± 0.074; P = 0.013) of nutritional status and significantly associated with the presence of malnutrition (odds ratio = 2.64; 95% confidence interval: 1.07–6.48; P = 0.035) in CPD patients after adjustment for related variables.

Conclusions

BCL is significantly associated with nutritional status and malnutrition in CPD patients. Therefore, it is important for CPD patients to avoid environmental exposure to cadmium such as through smoking and consumption of cadmium-rich foods.

Keywords:
Blood cadmium levels; Chronic peritoneal dialysis; Inflammation; Malnutrition