Background Subarachnoid hemorrhage (SAH) is a serious cause of headaches. The Ottawa
subarachnoid hemorrhage (OSAH) rule helps identify SAH in patients with acute …

We aim to externally validate the Ottawa subarachnoid hemorrhage (OSAH) clinical decision
rule. This rule identifies patients with acute nontraumatic headache who require further …

BACKGROUND: We previously derived the Ottawa Subarachnoid Hemorrhage Rule to
identify subarachnoid hemorrhage (SAH) in patients with acute headache. Our objective …

Objective To ensure good outcomes in the management of subarachnoid haemorrhage
(SAH), accurate prediction is crucial for initial assessment of patients presenting with acute …

Objective The Ottawa subarachnoid haemorrhage (SAH) rule suggests that alert patients
older than 15 years with a severe nontraumatic headache reaching maximum intensity …

Importance Three clinical decision rules were previously derived to identify patients with
headache requiring investigations to rule out subarachnoid hemorrhage. Objective To …

Objective: The primary objective of this study was to externally validate the OSR in a single
national health service (NHS) setting in the UK and secondly, to compare it with our current …

Objectives Subarachnoid haemorrhage (SAH) is an uncommon but important cause of
sudden‐onset headache. Three clinical decision rules (CDRs) for investigation in sudden …

Objectives: This study evaluated the incidence of subarachnoid hemorrhage (SAH) and the
use of computed tomography (CT) and lumbar puncture (LP) in a cohort of emergency …

Introduction. Acute headache is among the commonest presenting complaints to emergency
departments. While it is estimated that only 1–3% result from subarachnoid haemorrhage …