Third, we analysed both IFABP and inflammatory biomarkers at admission since previous studies have shown that IFABP increased before IL-6 during cardiac surgery, and both declined early.15, 17, 18 Both biomarkers have also declined early after cardiac arrest.10, 11, 42, 43, 44, 46, 47, 48, 49 In the sensitivity analysis, the effect through IL-6 at day one was less pronounced than through IL-6 at admission, suggesting against a delayed inflammatory response. Here, IL6 is linked to cardiac arrest.