F2 and Thrombocytopenia: In the original cohort, using univariate logistic regression, early severe thrombocytopenia, sex, first care unit, neoplasms, diseases of the respiratory system, sepsis, maximum partial pressure of carbon dioxide, minimum partial pressure of oxygen, maximum value of potassium, maximum value of prothrombin time, and maximum value of partial prothrombin time were considered statistically significant.