Sleep-disordered breathing: impact on functional outcome of ischemic stroke patients.
OBJECTIVE
Sleep-disordered breathing (SDB) is more prevalent in stroke patients than age- and sex-matched controls, but the relationship between SDB and functional outcome of stroke patients is unclear. The aim of our study was to determine the prevalence of SDB in ischemic stroke and its influence on functional outcome at 3 and 6 months after stroke onset.


METHODS
In a prospective study, 60 patients were selected by polysomnography (PSG). The apnea-hypopnea index (AHI) was determined 6.5+/-3.2 days after stroke onset. Neurologic severity at admission was assessed by the Scandinavian Stroke Scale (SSS) and outcome by the Barthel Index (BI). Patients were evaluated on admission, 3 and 6 months after stroke onset.


RESULTS
Among the 60 patients, 39 (65%) patients had SDB (AHI5); of these, 30 patients (50%) had AHI15 and 18 (30%)>30. On Logistic regression analysis, the BI at 3 months was independently predicted by SSS (OR=0.74, 95% CI [0.62-0.88], P=0.001) and AHI (OR=1.09, 95% CI [1.02-1.17], P<0.05). At 6 months, the BI was predicted only by SSS (OR=0.83, 95% CI [0.74-0.92], P=0.001).


CONCLUSIONS
SDB is common in patients during acute phase after stroke onset. SDB appears to be associated with a worse functional outcome during the early recovery period following stroke, increasing the likelihood of dependency.
Yan-fang
Shi
S
Department of Neurology, XuanWu Hospital, Capital Medical University, 45# Changchunjie Road, Beijing 100053, China.
Yu-ping
Wang
W
D000208:Acute Disease; D001039:Aphasia, Broca / Q000453:epidemiology*; D001921:Brain / Q000503:physiopathology; D005242:Fecal Incontinence / Q000453:epidemiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology*; D010108:Oxyhemoglobins / Q000378:metabolism; D017286:Polysomnography; D015995:Prevalence; D011446:Prospective Studies; D012678:Sensation Disorders / Q000175:diagnosis / Q000453:epidemiology*; D012720:Severity of Illness Index; D012891:Sleep Apnea Syndromes / Q000175:diagnosis / Q000453:epidemiology* / Q000378:metabolism; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis / Q000453:epidemiology* / Q000378:metabolism; D020521:Stroke / Q000453:epidemiology* / Q000503:physiopathology
D010108:Oxyhemoglobins