Clinical Trial: Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in Chronic Kidney Disease

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: Comparison of Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in CKD

Brief Summary: The majority of patients with moderate to severe chronic kidney disease (CKD) (stages 3 and 4) develop secondary hyperparathyroidism (2°HPT), but the optimal therapy to control hyperparathyroidism in this group is unknown. The National Kidney Foundation presented guidelines in 2003 recommending vitamin D supplementation for vitamin D insufficient patients and active vitamin D therapy in patients with sufficient levels. These guidelines are based on opinion since there are no significant trials to determine if vitamin D supplementation is effective in this population. The active vitamin D metabolites doxercalciferol, paricalcitol, and calcitriol have been shown to effectively suppress parathyroid hormone (PTH), but have not been compared with vitamin D supplementation with a calciferol (ergocalciferol or cholecalciferol). Beyond hyperparathyroidism, small studies suggest vitamin D replacement in vitamin D insufficient non-CKD subjects result in improved pain, feeling of well being, blood pressure and strength. In this proposed study we wish to directly compare the effectiveness of cholecalciferol versus doxercalciferol in suppressing elevated PTH levels in subjects with CKD not on dialysis who have vitamin D insufficiency in a three month study. Secondary endpoints will be change in blood pressure.

Detailed Summary: Patients with CKD stage 3 were randomly allocated (by blinded group allocation) to either cholecalciferol (4000 U per day for one month then 2000 IU daily thereafter) or doxercalciferol (2.5 mcg po daily. Assessments for blood endpoints (primary end point PTH; secondary calcium, phosphorus) were done monthly. Other assessments (blood pressure) were done at baseline and at 3 months.
Sponsor: Indiana University School of Medicine

Current Primary Outcome: Percent Reduction in PTH [ Time Frame: 3 month ]

Percent reduction in PTH from baseline to 3 months


Original Primary Outcome: Percent Reduction in PTH

Current Secondary Outcome: Systolic Blood Pressure at 3 Months [ Time Frame: 3 month ]

systolic blood pressure at 3 months


Original Secondary Outcome: effect on blood pressure, pain and general well being

Information By: Indiana University

Dates:
Date Received: January 31, 2006
Date Started: January 2006
Date Completion:
Last Updated: April 18, 2016
Last Verified: April 2016