20070360 Incident Dialysis

Inclusion Criteria: * Adults greater than or equal to 18 years of age on hemodialysis for \> 3 and less than or equal to 12 months prior to enrollment into the study * Mean of 2 PTH determinations during the screening period (drawn at least 2 days apart) \> 300 pg/mL (31.8 pmol/L); or biPTH \> 160 pg/mL (17.0 pmol/L) * Mean of 2 corrected serum calcium determinations drawn on the same day as the PTH determinations greater than or equal to 8.4 mg/dL (2.1 mmol/L) * Subject will be able to complete the study, to the best of his/her knowledge * Before any study-specific procedure, the appropriate written informed consent must be obtained Exclusion Criteria: * Mean of 2 PTH determinations during the screening period (drawn at least 2 days apart) \> 800 pg/mL (84.9 pmol/L); or biPTH \> 430 pg/mL (45.6 pmol/L) AND receiving vitamin D on entering screening * Parathyroidectomy (partial or full) less than or equal to 6 months before entering screening * Anticipated parathyroidectomy (partial or full) within 6 months after randomization * Have a scheduled date for kidney transplant surgery * Received cinacalcet since initiating hemodialysis * Have received vitamin D therapy for less than 30 days before entering screening or required a change in prescribed vitamin D brand or dose within 30 days before entering screening. If subjects are not receiving vitamin D therapy, they must remain free of vitamin D therapy for the 30 days before entering screening * Subject is pregnant (eg, posit…