Interrater agreement of EEG interpretation in comatose post cardiac arrest patients

Erik Westhall, Ingmar Rosén, Andrea O. Rossetti, Anne Fleur van Rootselaar, Troels Wesenberg Kjaer, Janneke Horn, Susann Ullén, Tobias Cronberg

Research output: Contribution to journalPublished meeting abstractpeer-review


Question: What is the interrater agreement of EEG interpretation in adult comatose post cardiac arrest patients using the American Clinical Neurophysiology Society (ACNS) standardized critical care EEG terminology? Methods: The EEG-data were obtained from patients included in the Target Temperature Management trial (TTM), an international, multicenter, clinical trial of temperature management in comatose cardiac arrest patients [N Engl J Med 2013]. In the TTM trial a routine EEG was performed in patients still comatose 12-36. h after rewarming.For this study, one EEG-specialist (IR) chose 20 EEGs, covering important aspects of the ACNS EEG terminology. Four EEG-specialists with different nationalities (Sweden: EW, Denmark: TWK, The Netherlands: AFvR and Switzerland: AOR) acquired the ACNS EEG terminology [J Clin Neurophys 2013;30:1-27] and studied a web-based training-module. The four EEG-specialists subsequently interpreted (blinded to patients' identity) the 20 EEGs, reporting the findings according to the ACNS EEG terminology. Percent agreement and Fleiss kappa values for every category in the terminology were calculated. Percent agreement was defined as the proportion of the 20 EEGs in which all interpreters reported identical findings. Results: There was 65% agreement on whether a rhythmic or periodic pattern was present or not (Kappa 0.44). If a rhythmic or periodic pattern was present there was 93% agreement on which type of pattern (periodic discharges, rhythmic delta activity, rhythmic spike-and-wave/polyspike-and-wave/sharp-and-slow-wave) (Kappa 0.65). Conclusions: Using the ACNS EEG terminology in adult comatose post cardiac arrest patients there was moderate agreement on the presence and type of periodic and rhythmic patterns.

Original languageEnglish
Pages (from-to)e171
JournalClinical Neurophysiology
Issue number8
Publication statusPublished - 2015
Event30th International Congress of Clinical Neurophysiology (ICCN) of the IFCN - Berlin, Germany
Duration: 2014 Mar 202014 Mar 23

Subject classification (UKÄ)

  • Neurology


Dive into the research topics of 'Interrater agreement of EEG interpretation in comatose post cardiac arrest patients'. Together they form a unique fingerprint.

Cite this