Some studies are showing that (1-84)PTH or the PTH ratio, such as (1-84)PTH/iPTH and (1-84)PTH/(7-84)PTH, are superior to single iPTH values for evaluating bone turnover in CKD patients, predicting the effectiveness of PTX, and estimating the fatality rate among hemodialysis patients [24, 28, 37, 38]. Here, PTH is linked to chronic kidney disease.