Fluid vs Weight 24 Hour Balance

Inclusion criteria: \- adult (age ≥ 18 years) patients admitted to intensive care unit. Exclusion criteria: * age \<18 years * pregnancy * inability to obtain standardized daily body weight using the ICU bed scale * incomplete 24-hour fluid balance data preventing calculation of cumulative balance * absence of an indwelling urinary catheter, extracorporeal life support (ECMO) or other extracorporeal circulation * open abdomen * open chest * lavage or irrigation procedures during the assessment interval * surgery during the assessment * massive bleeding * diarrhoea during the assessment period * massive transfusion protocol during the 24-hour interval and ICU stay shorter than 24 hours.