“…Abbreviations: BLOOD, urine occult blood; PRO, proteinuria; GLU, glucose; LEU, leukocyturia; KET, ketones; SG, specific gravity; PH, potential of hydrogen. References: for PH [ 7 , 8 , 26 , 42 ]; for PRO (a) severe and critical COVID-19 [ 2 , 7 , 8 , 11 , 29 ], (b) COVID-19 AKI [ 25 ], (c) COVID-19 mortality [ 9 , 25 ]; for GLU [ 7 , 8 , 11 ]; for LEU (a) severe and critical COVID-19 [ 7 , 8 , 42 ], (b) COVID-19 AKI [ 25 ]; for KET [ 16 ]; for SG [ 4 , 5 , 10 , 16 ]; for BLOOD (a) severe and critical COVID-19 [ 7 , 8 , 10 , 11 , 29 ], (b) COVID-19 AKI [ 16 , 22 , 44 ], (c) COVID-19 mortality [ 14 , 16 ].…”