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Introduction: Dialysis quality is an important factor in reducing inability and mortality in chronic kidney failure patients and can enhance their life quality and social activity. Objectives: The aim of this investigation was to examine the efficacy of dialysis based on urea reduction rate (URR) and the associated factors in hemodialysis patients due to the lack of clarity on the adequacy of dialysis. Patients and Methods: This multicenter cross-sectional study was conducted on 344 hemodialysis patients over 18 years and referred to seven dialysis centers in Guilan, Iran. The adequacy of dialysis was obtained using URR (>65%) criteria. Results: The mean URR of studied patients was 63 ±10.4%. The desirable dialysis adequacy was reached in 45.9% of the patients. There was a significant negative association between URR and BMI (r= -0.155, P =0.005). Patients who had normal calcium levels had significantly higher URR adequacy than patients with abnormal calcium levels ( P <0.001). The URR criterion was contrariwise associated to blood pressure before and after dialysis ( P <0.05). There was a significant association between the length of the time, patients underwent dialysis (in year) and URR (R=125, P =0.023). Conclusion: This study indicated that URR is a desirable criterion for dialysis adequacy, which was associated with blood pressure, serum calcium level and body mass index (BMI). These findings suggest providing treatment strategies based on these findings to enhance the effect of dialysis adequacy.

Aim: We aimed to investigate the associated risk factors of deep vein thrombosis (DVT) among COVID-19 patients. Materials & methods: In this cross-sectional study the demographical data and clinical characteristics of 382 COVID-19 patients were collected and analyzed. Results: The DVT was observed in 53 patients (14.1%). The rate of death was significantly associated with the incidence of DVT, 48.1 versus 32.2% in non-DVT cases; p = 0.034). Also, BMI (p = 0.0001), renal failure (p = 0.001), lower-limb edema (p = 0.0001) and intubation (p = 0.004) were associated with the risk of DVT. Conclusion: COVID-19 patients with a higher BMI, renal failure, lower-limb edema and need for intubation were at a higher risk of DVT.