Dataset Information
Routine vs extended outpatient EEG for the detection of interictal epileptiform discharges.
Ontology highlight
ABSTRACT: Objective
To compare the yield of epileptiform abnormalities on 30-minute recordings with those greater than 45 minutes.Methods
We performed a prospective observational cross-sectional study of all outpatient routine EEGs comparing the rate of interictal epileptiform discharges (IEDs) and clinical events during the initial 30 minutes (routine) with those occurring in the remaining 30-60 minutes (extended). A relative increase of 10% was considered clinically significant.Results
EEGs from 1,803 patients were included; overall EEG duration was 59.4 minutes (SD ±6.5). Of 426 patients with IEDs at any time during the EEG, 81 (19.1%, 95% confidence interval 15.6-23) occurred only after the initial 30 minutes. The rate of late IEDs was not associated with age, indication, IED type, or sleep deprivation. Longer recording times also increased event capture rate by approximately 30%.Conclusions
The yield of IED and event detection is increased in extended outpatient EEGs compared to 30-minute studies.
SUBMITTER: Burkholder DB
PROVIDER: S-EPMC4836883 | biostudies-literature | 2016 Apr
REPOSITORIES: biostudies-literature
Publications
Routine vs extended outpatient EEG for the detection of interictal epileptiform discharges.
Neurology 20160316 16
<h4>Objective</h4>To compare the yield of epileptiform abnormalities on 30-minute recordings with those greater than 45 minutes.<h4>Methods</h4>We performed a prospective observational cross-sectional study of all outpatient routine EEGs comparing the rate of interictal epileptiform discharges (IEDs) and clinical events during the initial 30 minutes (routine) with those occurring in the remaining 30-60 minutes (extended). A relative increase of 10% was considered clinically significant.<h4>Resul ...[more]