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ORIGINAL ARTICLE
Year : 2017  |  Volume : 20  |  Issue : 10  |  Page : 1309-1315

Predictors of Vitamin D deficiency in predialysis patients with stage 3–5 chronic kidney diseases in Southern China


1 Department of Nephrology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
2 Department of Gastroenterology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China

Correspondence Address:
Prof. A P Xu
Department of Nephrology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, 107 West Yanjiang Road, Guangzhou - 510 120
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/njcp.njcp_27_17

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Objective: Vitamin D status and risk factors of Vitamin D deficiency in chronic kidney disease (CKD) patients in China have been seldom reported before. In this study, we aim to investigate serum 25-hydroxyvitamin D [25(OH)D] status and find the predictors of Vitamin D deficiency in predialysis patients with Stage 3–5 CKDs in Southern China. Methods: In this retrospective cross-sectional study, hospitalized predialysis patients who were diagnosed of Stage 3–5 CKD and had taken measurement of serum 25(OH)D in a single center from January 2014 to June 2015 were included. Patients were divided into Vitamin D deficiency group and nondeficiency group depending on the cutoff serum 25(OH)D value of 37 nmol/L. Clinical and biochemical parameters were collected and evaluated for predictors of Vitamin D deficiency by logistic regression. Results: One hundred and fifty-two patients were included in this study, of which 87 (57.2%) were in Vitamin D insufficiency state while 60 (39.5%) were in Vitamin D deficiency state. Serum 25(OH)D levels of patients in Stage 4 and Stage 5 CKD were lower than that of patients in Stage 3 CKD (P = 0.002). It was discovered that female gender (odds ratio [OR] = 3.674; 95% confidence interval [CI], 1.607–8.396; P = 0.002), serum albumin level <30.0 g/L (OR = 6.816; 95% CI, 2.634–17.633; P < 0.001), and estimated glomerular filtration rate (eGFR) <30 ml/min/1.73 m2 (OR = 4.761; 95% CI, 1.353–16.754; P = 0.015) were independent predictors of Vitamin D deficiency. Conclusions: Vitamin D insufficiency and deficiency are common in predialysis patients with Stage 3–5 CKD in Southern China. Female gender, hypoalbuminemia with serum albumin level <30.0 g/L, and severe damaged renal function with eGFR <30 ml/min/1.73 m2 are independent predictors of Vitamin D deficiency in predialysis patients with Stage 3–5 CKD.


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