Effect of Cool Dialysate on Depression in Patients with Chronic Renal Failure Treated with Hemodialysis: A Randomized Clinical Trial

Background: Depression is one of the most common psychiatric problems in hemodialysis patients. Objectives: This study aimed to evaluate the effect of cool dialysate on depression in patients with chronic renal failure treated with hemodialysis. Methods: This randomized clinical trial was performed on 66 hemodialysis patients suffering from depression. Patients were selected by a convenience sampling method and divided equally into intervention and control groups randomly by permuted block allocation, each group containing 33 patients. Data were acquired with the Beck Depression inventory-I. The intervention and control groups underwent one month of treatment with cool dialysate at 35.5 and 37°C, respectively. The severity of depression for each group was measured at the end of each treatment stage and two weeks after the intervention. Data were analyzed using R version 25 software with a confidence level of 95%. Results: There was no statistically significant difference between the control and intervention groups before and after the intervention (P-values more than 0.05). While the mean of depression severity for the control group decreased from 26.151.46 to 22.24 2.00 (P-values < 0.01), the mean of depression severity for the intervention group decreased from 25.561.28 to 22.411.65 by the intervention (P-value > 0.05). Conclusions: The application of cool dialysate as a non-pharmacological method did not significantly reduce the severity of depression in patients undergoing hemodialysis. Therefore, it is advised to perform further studies that include more research units from different geographical locations, considering a longer intervening duration.