IL6 and hemorrhage: Particularly courses of IL6 levels were related to the impact of hemorrhage expressed according to WFNS scale score: significant differences of the values for the WFNS A vs. WFNS B group were found at day 1 (p = 0.001); day 7 (p = 0.007); day 10 (p = 0.010), and day 14 (p = 0.035; Mann–Whitney U test).