Abstract
AIM: To determine the importance of urinary biochemical parameters on the severity of coronavirus disease-2019 (COVID-19). METHODS: One hundred and thirty-three patients who were diagnosed with COVID-19 were retrospectively included. Groups were formed according to the severity of their disease (moderate [n = 85], severe [n = 29] and critical = [n = 19]), and an additional control group was created from healthy individuals (n = 50). We investigated the correlation between urine biochemical parameters and the severity of the disease. RESULTS: Erythrocyturia, proteinuria and glucosuria rates were significantly higher in patients than in the controls. In patients, the median urine specific gravity (SG) was lower (P < .001), and the median potential of hydrogen (pH) value was higher compared with the controls (P < .001). In correlation analyses, there were strong positive correlations between disease severity and age (r = 0.545, P < .001), RR (r = 0.838, P < .001) and proteinuria (r = 0.462, P < .001), while there was a strong negative correlation with SpO(2) (r = -0.839, P = .001). On multivariate analysis, age (OR: 1.06, 95% CI 1.03-1.10, P = .035), respiratory rate ≥30 breaths/min (OR: 4.72, 95% CI 1.26-6.24, P < .0031), SpO(2) ≤ 93% (OR: 3.82, 95% CI 1.18-5.82, P = .001) and proteinuria (OR: 1.13, 95%CI 1.02-2.1, P = .023) were independent predictive factors for disease severity. CONCLUSION: Proteinuria in routine urine analysis, which is one of the parameters that can be easily applied in the application, may be related to the severity of the COVID-19 disease.