Bellavere's scoring in chronic kidney disease: A study protocol [version 1; peer review: awaiting peer review]

Background: Chronic kidney disease (CKD) refers to abnormalities in kidney structure and/or function for more than three months; cardiac autonomic neuropathy (CAN) is an indicator of cardiovascular death due to various abnormalities such as cardiac arrhythmias. Heart rate variability (HRV) is an important component of CAN and has been shown to be related to CAN. This study aims to evaluate cardiac autonomic neuropathy at different stages of CKD with the Bellavere score and to correlate CAN with lipids, plasma, electrolytes and blood pressure in patients with CKD at different stages. Methods: Consent of 95 patients who met the diagnosis of chronic kidney disease according to Modification of Diet in Renal Disease (MDRD) criteria were included in the study. All subjects will have blood tests for lipids, anaemia, and electrolytes. All participants' blood pressure will be monitored. All subjects will also be scored based on the Bellevere scoring system, the Valsava ratio, and the 30:15 ratio. Data will be analyzed using SPSS version 21 and appropriate statistical tests will be used depending on the study objectives and the data collected. Expected results: Based on the literature review and previous studies, the results of this study should demonstrate the relationship between CAN and CKD at this stage. The study also expects to find higher Bellavere scores in patients with different stages of CKD.