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Nephrol Dial Transplant. 2014 Aug;29(8):1532-8. doi: 10.1093/ndt/gfu055. Epub 2014 Mar 18.

A higher serum alkaline phosphatase is associated with the incidence of hip fracture and mortality among patients receiving hemodialysis in Japan.

Author information

1
Division of Nephrology and Hypertension, The Jikei University School of Medicine, Tokyo, Japan.
2
Committee of Renal Data Registry, Japanese Society for Dialysis Therapy, Tokyo, Japan.
3
Department of Pathophysiology and Therapy in Chronic Kidney Disease, The Jikei University School of Medicine, Tokyo, Japan.
4
Division of Nephrology, Department of Medicine, Wakayama Medical University, Wakayama, Japan.

Abstract

BACKGROUND:

Monitoring of serum alkaline phosphatase (ALP) is recommended in the management of chronic kidney disease-mineral and bone disorder (CKD-MBD). However, unlike calcium, phosphate or parathyroid hormone, the relationship between serum ALP and patient outcome receiving hemodialysis (HD) in Japan is unknown.

METHODS:

Baseline data of 185 277 HD patients with duration >90 days (66 ± 12 years, males 61.9%, and median HD duration of 5.8 years) were extracted from a nationwide dialysis registry at the end of 2009 in Japan. Outcomes were then evaluated using the registry at the end of 2010 using a multivariate logistic regression analysis.

RESULTS:

During 1-year follow-up, 14 230 (7.9%) patients died of all causes, including 6396 (3.6%) cardiovascular deaths. In addition, 1586 patients (1.0%) were newly diagnosed as hip fractures. All-cause and cardiovascular mortality and the incidence of hip fracture were higher in line with the increase in baseline serum ALP. On multivariate analysis, patients with the highest ALP quartile had higher all-cause and cardiovascular mortalities and a higher incidence of hip fracture than those with the lowest quartile [odds ratio (OR) 1.46, 95% confidence interval (CI) 1.33-1.60; OR 1.25, 95% CI 1.10-1.42; and OR 1.71, 95% CI 1.33-2.18, respectively].

CONCLUSIONS:

In this large cohort study, higher serum ALP levels were independently associated not only with mortality but also with the incidence of hip fracture in Japanese HD patients. Further study is needed to test whether serum ALP measurements could improve the patient outcomes.

KEYWORDS:

alkaline phosphatase; cardiovascular disease; chronic kidney disease-mineral and bone disorder; hemodialysis; parathyroid hormone

PMID:
24642419
DOI:
10.1093/ndt/gfu055
[Indexed for MEDLINE]

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