Similarly in the case of the insomnia index, as shown in Table 5, the p-value of age (0.24), duration of dialysis (0.44), potassium (0.99), calcium (0.22), BUN (0.28), phosphate (0.88), parathyroid hormone (0.41), vitamin D3 (0.65), hemoglobin (0.41), sodium (0.77) were all more than 0.05, proving that these parameters did not show any association with participants who had insomnia and those who did not have insomnia. Here, PTH is linked to insomnia.