the Study on Prognostic for Hemodialysis Patients

Results from KDOQI guidelines, parathyroid hormone (PTH) level within target range is 150-300pg/ml. Both lower PTH levels and higher PTH levels were associated with higher risk of all-cause mortality. However, in out of target range, it is still unknown which mortality higher. so, in this prospective, observational clinical trial study. the investigators will observe the mortality and cardiovascular incidence rate between SHPT(\>800pg/ml) and low serum PTH levels(\<60pg/ml). Both two groups of patients will receive a reasonable treatment according to the suggestions in K/DOQI guidelines.