Hypertension and nephrology

[Prevalence of bone abnormalities and soft tissue calcification and their determining factors in dialyzed patients]

KISS Zoltán, AMBRUS Csaba, SZABÓ András, SZEGEDI János, BALLA József, TÖRÖK Marietta, LADÁNYI Erzsébet, CSIKY Botond, ÁRKOSSY Ottó, TÚRI Sándor, KULCSÁR Imre, KISS István

SEPTEMBER 21, 2012

Hypertension and nephrology - 2012;16(03-04)

[Disturbances of bone and mineral metabolism are frequent complications of chronic kidney disease. In the last decades, increasing evidence of both pathophysiological and epidemiological nature support the relationship between bone disease and soft tissue calcification. In this current research, we analysed characteristics, determining factors and relationship of these two complications in a nationwide, cross-sectional cohort of dialysed patients. We collected demographical data (age, gender, body weight, height, diabetes, type of dialysis), laboratory results (serum parathormone, calcium, phosphat, albumin levels) and the presence of diabetes mellitus, bone abnormalities and soft-tissue calcification in patients on maintenance dialysis in 2010. The prevalence of bone abnormalities and soft tissue calcification followed similar pattern: both prevalences were high when parathormone <150 pg/ml (42.9% and 51.5%, respectively) or >500 pg/ml (44.2% and 55.5%) and they were significantly lower when parathormone was between 150-500 pg/ml (30.7% and 47.4%). In a multivariate logistic regression model, independent predictors of bone abnormalities were low (<150 pg/ml) and high (>500 pg/ml) parathormone levels (p<0.001), orhemodialysis (vs peritoneal dialysis) (p<0.001), age (p<0.001) and diabetes (p<0.001). In a similar statistical model, predictors of soft tissue calcification were also low (<65 pg/ml) (p<0.01) and high (>500 pg/ml) parathormone levels (p<0.001), hemodialysis (p<0.001), age (p<0.001), diabetes (p<0.001) and serum calcium level greater than 2.4 mmol/l (p<0.05). In summary, there was a U-shaped relationship between increasing serum parathormone levels and prevalence of bone abnormalities and soft tissue calcification in ESRD patients on maintenance dialysis. Further research and long term follow up are needed in order to reveal more detailed relationship among the two diseases and their determining factors.]

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