Among the clinical and laboratory data, variables with p < 0.10 in the univariate negative binomial models (the prior history of diabetes, older age, ultrafiltration rate, and intact parathyroid hormone), and the prior history of coronary artery disease, and congestive heart failure (which were considered to be important risk factors for IDH, even though their p-values was 0.225 and 0.846, respectively) are also reported in Table 3. Here, PTH is linked to congestive heart failure.