The specific intensive care factors: saturation of peripheral oxygen (SpO2), fraction of inspired oxygen (FiO2), oxygen partial pressure (pO2), carbon dioxide partial pressure (pCO2), potential of hydrogen (pH), mechanical ventilation and hemoglobin (Hb) from patients on ICU did not show a significant association for complications in general or from infections and infections with problematic germs (Table 11, Table 12 and Table 13). The gene discussed is GSTM1; the disease is infection.