Taiwan ranks in the first place of ESRD incidence over the world. Low awareness of CKD could be one of the reasons. CKD-MBD is a common complication but patients usually neglect because of mild symptoms. CKD-MBD includes vascular calcification, which may participate in the formation of atherosclerosis or increasing cardiovascular disease. It is the most worrisome situations. According to 2009 KDIGO guidelines, intact-PTH is suggested to control within two to nine times of normal value. However, in TWRDS 2005~2012 database, more than half of hemodialysis patients had abnormal PTH level, higher than the report from the COSMOS study. Among those with low PTH level < 150 pg/mL, after adjusting for age, sex, diabetes, kt/V, hazard ratio of mortality was significantly higher than those with normal or higher PTH levels.