Jendé L Zijlmans1, Bert A Coert1, René van den Berg2, Marieke E S Sprengers2, Charles B L M Majoie2, W Peter Vandertop3, Dagmar Verbaan1. 1. Department of Neurosurgery, Neurosurgical Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands. 2. Department of Neuroradiology, Amsterdam University Medical Centers, Amsterdam, The Netherlands. 3. Department of Neurosurgery, Neurosurgical Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands. Electronic address: w.p.vandertop@amc.uva.nl.
Abstract
BACKGROUND: Patients with an aneurysmal subarachnoid hemorrhage (aSAH) and World Federation of Neurosurgical Societies (WFNS) grade I on admission are generally considered to have a good clinical outcome. OBJECTIVE: The objective of this study was to assess the actual clinical outcome of WFNS grade I aSAH patients, and to determine which factors are associated with unfavourable outcome. METHODS: For this prospective cohort study, 132 consecutive patients (age 18 years or older) with a WFNS grade I aSAH admitted to our hospital between December 2011 and January 2016 were eligible. Clinical outcome was measured using the modified Rankin Scale (mRS) at 6-month follow-up. Unfavorable outcome was defined as an mRS score of 3-6. Univariable analyses were performed using logistic regression models. RESULTS: Of 116 patients, only 5 patients (4%) had an mRS score of 0 and most (65%) had an mRS score of 2. Twenty-five patients (22%) had an unfavorable outcome. Nine (8%) patients died, of whom 4 died during admission. Factors associated with unfavorable outcome were age (per increasing decade: odds ratio [OR]. 1.78; 95% confidence interval [CI], 1.16-2.72), delayed cerebral ischemia (OR, 4.32; 95% CI, 1.63-11.44), pneumonia (OR, 10.75; 95% CI, 1.94-59.46) and meningitis (OR, 28.47; 95% CI, 1.42-571.15). CONCLUSIONS: Despite their neurologically optimal clinical condition on admission, 1 in 5 patients with WFNS grade I aSAH has an unfavorable clinical outcome or is dead at 6-month follow-up. Additional multivariable analysis in larger patient cohorts is necessary to identify the extent to which preventable complications contribute to unfavorable outcomes in these patients.
BACKGROUND:Patients with an aneurysmal subarachnoid hemorrhage (aSAH) and World Federation of Neurosurgical Societies (WFNS) grade I on admission are generally considered to have a good clinical outcome. OBJECTIVE: The objective of this study was to assess the actual clinical outcome of WFNS grade I aSAH patients, and to determine which factors are associated with unfavourable outcome. METHODS: For this prospective cohort study, 132 consecutive patients (age 18 years or older) with a WFNS grade I aSAH admitted to our hospital between December 2011 and January 2016 were eligible. Clinical outcome was measured using the modified Rankin Scale (mRS) at 6-month follow-up. Unfavorable outcome was defined as an mRS score of 3-6. Univariable analyses were performed using logistic regression models. RESULTS: Of 116 patients, only 5 patients (4%) had an mRS score of 0 and most (65%) had an mRS score of 2. Twenty-five patients (22%) had an unfavorable outcome. Nine (8%) patients died, of whom 4 died during admission. Factors associated with unfavorable outcome were age (per increasing decade: odds ratio [OR]. 1.78; 95% confidence interval [CI], 1.16-2.72), delayed cerebral ischemia (OR, 4.32; 95% CI, 1.63-11.44), pneumonia (OR, 10.75; 95% CI, 1.94-59.46) and meningitis (OR, 28.47; 95% CI, 1.42-571.15). CONCLUSIONS: Despite their neurologically optimal clinical condition on admission, 1 in 5 patients with WFNS grade I aSAH has an unfavorable clinical outcome or is dead at 6-month follow-up. Additional multivariable analysis in larger patient cohorts is necessary to identify the extent to which preventable complications contribute to unfavorable outcomes in these patients.