Impact of Negative Fluid Balance on Mortality and Outcome of Patients with Confirmed COVID-19

Purpose. Maintaining the proper fluid balance is a fundamental step in the management of hospitalized patients. The current study evaluated the impact of negative fluid balance on outcomes of patients with confirmed COVID-19. Methods. We considered the negative fluid balance as a higher output fluid compared to the input fluid. The fluid balance was categorized into four groups (group 4: −850 to −500 ml/day; group 3: −499 to −200 ml/day, group 2: −199 to 0 ml/day, and group 1 : 1 to 1000 ml/day) and included ordinally in the model. The outcomes were all-cause mortality, length of hospitalization, and improvement in oxygen saturation. Results. The fluid balance differed significantly among nonsurvivors and survivors (MD: −317.93, 95% CI: −410.21, −225.69, and p781 pg/mL and fluid balance >−430 mL might be the predictors for positive fluid balance and mortality, respectively