PURPOSE: Ambulatory EEGs in @entity1 are frequently ordered as sleep studies. However, the yield according to different clinical situations has received little attention to date. The authors aimed to quantify the added value in terms of detection of epileptiform features of an EEG containing sleep, as compared with only wakefulness, according to the referral diagnoses. METHODS: The authors retrospectively selected consecutive outpatients' EEG recordings of @entity1 between 6 months to 16 years old, performed between January 2014 and February 2015. The authors excluded those lacking at least 10 minutes of waking and/or at least 5 minutes of behavioral sleep. @entity302 ( @entity302 ) in wakefulness and sleep was compared among referral suspected diagnoses. @entity25 was considered if at least one of the following was observed: appearance of @entity302 or increase by >50%; @entity302 change in localization or morphology, @entity410 occurrence. RESULTS: A total of 425 recordings (mean age 6.9    4.7 years) were analyzed. Of them, 194 (45.6%) presented an additional yield during sleep, which was dependent on the occurrence of @entity302 during wakefulness: 77/251 (30.7%) in those without versus 117/174 (67.2%) in those with wakefulness @entity302 (P < 0.001,   ). The yield was markedly lower in studies performed for nonepileptic referral diagnoses (7% vs. 43% to 100%; P < 0.001, Fisher). CONCLUSIONS: When wakefulness EEG lacks epileptiform features, the yield of sleep EEG in our pediatric population appeared modest, especially in @entity1 without a suspected @entity302 . This information may be used to optimize the request of sleep EEG in @entity1 .

Yield of Outpatient Sleep EEG for Epileptiform Alterations' Detection in XXXX .

@entity1 :: ('9606', 'Species') :: ['children', 'patients'] @entity410 :: ('MESH:D012640', 'Disease') :: ['seizure'] @entity302 :: ('MESH:D004827', 'Disease') :: ['epileptic syndrome', 'interictal epileptiform activity', 'Interictal epileptiform activity', 'IEA'] @entity25 :: ('MESH:D012893', 'Disease') :: ['Additional yield of sleep']
@entity1 :: (9606,Species) :: ['Children']
