Cited by 121Epilepsy research and treatmentSleep and related disordersSleep and Wakefulness Research

The FLEP scale in diagnosing nocturnal frontal lobe epilepsy, NREM and REM parasomnias: Data from a tertiary sleep and epilepsy unit

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Manni, Raffaele, Terzaghi, Michele, Repetto, Alessandra·2008·Epilepsia

Abstract

PURPOSE: To test the usefulness of the FLEP scale in diagnosing nocturnal frontal lobe epilepsy (NFLE), arousal parasomnias, and REM sleep behavior disorder (RBD). METHODS: The FLEP scale was applied to 71 subjects (60 male; 11 female; aged 54 +/- 21) referred to an outpatient's sleep and epilepsy unit for diagnostic assessment of nocturnal motor-behavioral episodes, which turned to be arousal parasomnias (11 subjects), NFLE (14 subjects), or idiopathic RBD (46 subjects), based on the findings of in-lab full night video polysomnography with extended EEG montages. RESULTS: The sensitivity of the scale as a diagnostic test for NFLE was 71.4%, the specificity 100%, the positive predictive value 100%, and the negative predictive value 91.1%. The FLEP scale gave an incorrect diagnosis in 4/71 (5.6%) of the cases, namely NFLE patients with episodes of nocturnal wandering, and uncertain diagnostic indications in 22/71 subjects (30.9%). CONCLUSIONS: The FLEP scale shows high positive and negative predictive values in diagnosing NFLE versus arousal parasomnias and RBD. However, the scale is associated with a real risk of misdiagnosis in some patients and gives uncertain indications in about one-third of cases, mainly RBD. Our investigation highlights the inadequacy of some of the items in the scale. The item investigating wandering, as presently formulated, may be unable to distinguish nocturnal wandering from sleepwalking. The items about "recall" and "clustering" of the events throughout the night may increase the likelihood of mistaking RBD for seizures. Further testing of the reliability of the FLEP scale items appears to be needed.

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Crossref · 10.1111/j.1528-1167.2008.01602.x

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  • A successive Italian validation of the FLEP scale, with diagnoses confirmed by in-lab VPSG, did not confirm the encouraging results; the scale gave an incorrect diagnosis in 5.6% of cases and around one-third of cases had uncertain diagnostic indications.

    “A successive Italian validation of the same scale [37], in which the diagnoses were confirmed by in-lab VPSG, did not confirm these encouraging results. The scale gave an incorrect diagnosis in 5.6% of cases, which included patients with SHE seizures characterized by nocturnal wandering (mistaken for SW), while around one-third of cases had uncertain diagnostic indications, due to items associated”

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Authors
Manni, R., Terzaghi, M., & Repetto, A.
Affiliations
Fondazione Istituto Neurologico Nazionale Casimiro Mondino (IT)
Corresponding author
Manni, Raffaele
Venue
Epilepsia
Publisher
Wiley
Published
2008-09
Volume
49
Issue
9
Pages
1581-1585
ISSN
  • 0013-9580 (ISSN-L)
  • 1528-1167
OpenAlex
W2036750865
Cited by
121
References
22
Citations by year
2026: 1 · 2025: 5 · 2024: 3 · 2023: 7 · 2022: 3 · 2021: 10 · 2020: 7 · 2019: 3 · 2018: 12 · 2017: 4 · 2016: 10 · 2015: 5 · 2014: 5 · 2013: 9 · 2012: 10
FWCI
6.08
Type
journal article
Language
en
Open access
Locations
  • Epilepsia (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
nocturnal frontal lobe epilepsy, REM sleep behavior disorder, nocturnal wandering, sleepwalking, misdiagnosis, diagnostic accuracy
MeSH terms
Adolescent, Adult, Aged, Arousal, Circadian Rhythm, Diagnosis, Differential, Electroencephalography, Female, Humans, Male, Middle Aged, Predictive Value of Tests, Sensitivity and Specificity, Sleep Stages, Sleep, REM, Videotape Recording, Epilepsy, Frontal Lobe, Polysomnography, Parasomnias

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