IL6 and septic shock: The IL-6 rs1800795 CC carrier who underwent cardiac surgery had higher risk of septic shock-related death during the first 7 days (aHR 18.39; p = 0.001) and 28 days (aHR 6.1; p = 0.025) than IL-6 rs1800795 GG/GC carrier, whereas IL-6 rs1800795 CC carrier who underwent abdominal surgery had higher risk of septic shock-related death during all follow-up (90 days) (aHR 1.98; p = 0.050) than IL-6 rs1800795 GG/GC carrier.