General demographics | Age |
 | Sex |
 | Weight |
Physiological variables | Blood pressure |
 | Heart rate |
Variables that affect and/or represent total body water | Total fluid input during the first 24 hours |
 | Total fluid output during the first 24 hours |
 | Serum creatinine, as a surrogate marker of kidney function |
 | Serum sodium |
Variables that affect insensible fluid loss | Body surface area |
 | Temperature |
Variables that reflect severity of illness | Serum albumin |
 | Serum lactate |
 | Maximum number of vasopressors and inotropes |
 | Maximum number of sedatives and narcotic agents |
 | Serum bilirubin |
 | Haemoglobin |
 | Platelet count |
 | PaO2:FiO2 ratio |