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. 2016 Jul-Aug;20(4):460-7.
doi: 10.4103/2230-8210.183457.

Prevalence and severity of disordered mineral metabolism in patients with chronic kidney disease: A study from a tertiary care hospital in India

Sanjay Vikrant  1 , Anupam Parashar  2
Affiliations

Prevalence and severity of disordered mineral metabolism in patients with chronic kidney disease: A study from a tertiary care hospital in India

Sanjay Vikrant et al. Indian J Endocrinol Metab. 2016 Jul-Aug.

Abstract

Background: Disordered mineral metabolism is common complications of chronic kidney disease (CKD). However, there are limited data on the pattern of these disturbances in Indian CKD population.

Materials and methods: This was a prospective observational study of CKD-mineral and bone disorder (CKD-MBD) over a period of 3 years. The biochemical markers of CKD-MBD, namely, calcium, phosphorus, alkaline phosphatase, intact parathyroid hormone (iPTH), and 25-hydoxyvitamin Vitamin D3 (25OHD), were measured in newly diagnosed CKD Stage 3-5 and prevalent CKD Stage 5D adult patients.

Results: A total of 462 patients of CKD Stage 3-5D were studied. The frequency of various biochemical abnormalities was hypocalcemia (23.8%), hypercalcemia (5.4%), hypophosphatemia (2.8%), hyperphosphatemia (55.4%), raised alkaline phosphatase (56.9%), secondary hyperparathyroidism (82.7%), and hypoparathyroidism (1.5%). 25OHD was done in 335 (72.5%) patients and 90.4% were found to have Vitamin D deficiency. About 70.6% of the patients had iPTH levels were above kidney disease outcomes quality initiative (KDOQI) target range. Nondiabetic CKD as compared to diabetic CKD had a higher alkaline phosphatase (P = 0.016), a higher iPTH (P = 0.001) a higher proportion of patients with iPTH above KDOQI target range (P = 0.09), and an elevated alkaline phosphatase (P = 0.004). The 25OHD levels were suggestive of severe Vitamin D deficiency in 33.7%, Vitamin D deficiency in 45.4%, and Vitamin D insufficiency in 11.3% patients. There was a significant positive correlation between iPTH with alkaline phosphatase (r = 0.572, P = 0.001), creatinine (r = 0.424, P = 0.001), and phosphorus (r = 0.241, P = 0.001) and a significant negative correlation with hemoglobin (r = -0.325, 0.001), age (r = -0.169, P = 0.002), and 25OHD (r = -0.126, P = 0.021). On multivariate logistic regression analysis, an elevated alkaline phosphatase was a significant predictor of hyperparathyroidism (odds ratio 9.7, 95% confidence interval 4.9-19.2, P = 0.001).

Conclusions: There was a high prevalence of CKD-MBD in Indian CKD patients. CKD-MBD is more common and more severe and has an early onset as compared to the western populations.

Keywords: Chronic kidney disease; Vitamin D; chronic kidney disease-mineral and bone disorder; hyperparathyroidism; hyperphosphatemia; hypocalcemia; mineral metabolism disorder.

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Figures

Figure 1
Figure 1
Box plots of hemoglobin and creatinine in different chronic kidney disease stages
Figure 2
Figure 2
Box plots of calcium and phosphorus in different chronic kidney disease stages
Figure 3
Figure 3
Box plots of alkaline phosphatase and intact parathyroid hormone in different chronic kidney disease stages
Figure 4
Figure 4
Boxplots of 25-hydoxyvitamin Vitamin D3 in different chronic kidney disease stages
Figure 5
Figure 5
Scatter plot intact parathyroid hormone levels versus diabetic and nondiabetic patients (P = 0.001)
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