PTH and coronary artery disorder: Then, multivariate negative binomial models were made using only the variables from clinical and laboratory data without any HRV results, leading to the basic model, in which the prior history of diabetes, coronary artery disease, or congestive heart failure, age, ultrafiltration rate, intact parathyroid hormone, and the history of antihypertensive agents were included (Model 1 in Table 4).