“… Zumofen et al (2018) found in their cohort that the older was a patient, the lower was his pre-ictal functional status, and the more likely he presented in poor condition following aSAH. In recent decades, the systemic inflammatory response has attracted the clinician’s attention for assessing aSAH severity and predicting the prognosis ( Kalinkin et al, 2017 ; Gusdon et al, 2021 ; Ma et al, 2021 ); our study confirmed that the risk of developing unfavorable outcome is greater in patients with higher WBC at the time of admission. Compared with other research which revealed the prognostic value of the NLR and SIRI in patients with aneurismal subarachnoid hemorrhage ( Kalinkin et al, 2017 ; Zhang et al, 2020 ; Hu et al, 2021 ), the WBC on admission is more intuitive and accessible.…”