ABSTRACT NUMBER: ESOC2026A1817 ONLINE COGNITIVE SCREENING AFTER SUBARACHNOID HEMORRHAGE: THE AMSTERDAM COGNITION SCAN

Abstract Background and aims Subarachnoid hemorrhage (SAH) can lead to persistent cognitive impairments that negatively affect quality of life and participation, yet these are often underrecognized. Online cognitive screening may offer a feasible method for early detection, but its applicability in the SAH population remains unclear. This study explores the feasibility of the Amsterdam Cognition Scan (ACS), a web-based cognitive test battery administered remotely, defined as the proportion of patients who complete it. In addition, associations between objectively measured cognitive functioning and cognitive complaints, quality of life, and work resumption are examined. Methods 150 subsequent patients participating in the MEASURE observational cohort study receive an email link to the ACS at 6 months after SAH, allowing fully remote assessment. The ACS is a digital test battery of approximately 60 minutes, consisting of seven tasks assessing attention, memory, processing speed, executive functioning, and psychomotor speed. The ACS is validated in healthy participants and various patient populations (e.g. oncology). Completion rates of the full battery and individual tests are examined descriptively, and patient characteristics associated with completion are explored. Associations between the ACS global cognition score and patient-reported outcomes (i.e., CLCE-24, SSQoL, IPCQ), are analyzed using regression analyses. Results 86 patients completed the test battery. Data collection is ongoing and interim results will be presented. Conclusions Remote online cognitive assessment may offer a low-burden approach to post-SAH cognitive screening, with potential to reduce demands on patients and healthcare services, providing (anticipating) completion rates are high and outcomes relate to quality of life and participation. Conflict of interest Teuni ten Brink: nothing to disclose. Joris de Graaf: nothing to disclose. Philippine van Wijngaarden: nothing to disclose. Mervyn Vergouwen: nothing to disclose. Jeroen Boogaarts: nothing to disclose. R. Selles: nothing to disclose. C.G.M. Meskers: nothing to disclose. Anne Visser-Meily: nothing to disclose.