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Very good inter-rater reliability of Engel and ILAE epilepsy surgery outcome classifications in a series of 76 patients

Very good inter-rater reliability of Engel and ILAE epilepsy surgery outcome classifications in a series of 76 patients
Very good inter-rater reliability of Engel and ILAE epilepsy surgery outcome classifications in a series of 76 patients

The inter-rater reliability, expressed as kappa score, k, of the Engel and International League Against Epilepsy (ILAE) classifications of epilepsy surgery seizure outcome has not previously been evaluated. In a consecutive series of 76 patients (40 male; 25 children), 75 undergoing resective and 1 disconnective surgery at a mean age of 27.5 years (13 months-62 years), one observer classified 88% (n = 67) and a second observer classified 87% (n = 66) of patients as either Engel I or II (free from or rare disabling seizures) after a median follow up of 36 months (range 12-92 months); comparably, both observers classified 84% (n = 64) as ILAE 1-3. Correlation for Engel versus ILAE for observer 1 was 0.933 (p <.0005) and for observer 2 was 0.931 (p <.0005). Both ILAE (k 0.81, 95% confidence intervals 0.69, 0.91) and Engel (k 0.77, 95% CI 0.65, 0.87) classifications have very acceptable inter-rater reliability as well as significant correlation.

Engel, Epilepsy surgery, ILAE, Inter-rater, Outcome
1059-1311
809-812
Durnford, Andrew J.
5b49b848-cf34-4024-9399-c342d71b09b6
Rodgers, William
45981ae3-fc7b-4061-b160-1498e61ec1c5
Kirkham, Fenella J.
1dfbc0d5-aebe-4439-9fb2-dac6503bcd58
Mullee, Mark A.
fd3f91c3-5e95-4f56-8d73-260824eeb362
Whitney, Andrea
786b3e0e-6d15-4474-8007-4453e2dcff9b
Prevett, Martin
d0c9e58d-4823-4ba0-b966-4dffd0c1545b
Kinton, Lucy
0407451c-8b89-4b8a-8927-831c45b0ee19
Harris, Matthew
8cb2d8e2-5db1-4517-90ff-f95ed67b2bc4
Gray, William P.
1d25fc21-c58d-4342-9264-e4f53e04f702
Durnford, Andrew J.
5b49b848-cf34-4024-9399-c342d71b09b6
Rodgers, William
45981ae3-fc7b-4061-b160-1498e61ec1c5
Kirkham, Fenella J.
1dfbc0d5-aebe-4439-9fb2-dac6503bcd58
Mullee, Mark A.
fd3f91c3-5e95-4f56-8d73-260824eeb362
Whitney, Andrea
786b3e0e-6d15-4474-8007-4453e2dcff9b
Prevett, Martin
d0c9e58d-4823-4ba0-b966-4dffd0c1545b
Kinton, Lucy
0407451c-8b89-4b8a-8927-831c45b0ee19
Harris, Matthew
8cb2d8e2-5db1-4517-90ff-f95ed67b2bc4
Gray, William P.
1d25fc21-c58d-4342-9264-e4f53e04f702

Durnford, Andrew J., Rodgers, William, Kirkham, Fenella J., Mullee, Mark A., Whitney, Andrea, Prevett, Martin, Kinton, Lucy, Harris, Matthew and Gray, William P. (2011) Very good inter-rater reliability of Engel and ILAE epilepsy surgery outcome classifications in a series of 76 patients. Seizure, 20 (10), 809-812. (doi:10.1016/j.seizure.2011.08.004).

Record type: Article

Abstract

The inter-rater reliability, expressed as kappa score, k, of the Engel and International League Against Epilepsy (ILAE) classifications of epilepsy surgery seizure outcome has not previously been evaluated. In a consecutive series of 76 patients (40 male; 25 children), 75 undergoing resective and 1 disconnective surgery at a mean age of 27.5 years (13 months-62 years), one observer classified 88% (n = 67) and a second observer classified 87% (n = 66) of patients as either Engel I or II (free from or rare disabling seizures) after a median follow up of 36 months (range 12-92 months); comparably, both observers classified 84% (n = 64) as ILAE 1-3. Correlation for Engel versus ILAE for observer 1 was 0.933 (p <.0005) and for observer 2 was 0.931 (p <.0005). Both ILAE (k 0.81, 95% confidence intervals 0.69, 0.91) and Engel (k 0.77, 95% CI 0.65, 0.87) classifications have very acceptable inter-rater reliability as well as significant correlation.

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More information

Accepted/In Press date: 12 August 2011
e-pub ahead of print date: 14 September 2011
Published date: December 2011
Keywords: Engel, Epilepsy surgery, ILAE, Inter-rater, Outcome

Identifiers

Local EPrints ID: 429221
URI: http://eprints.soton.ac.uk/id/eprint/429221
ISSN: 1059-1311
PURE UUID: abec32fd-f340-4136-b4b9-13145813d2a8
ORCID for Fenella J. Kirkham: ORCID iD orcid.org/0000-0002-2443-7958

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Date deposited: 22 Mar 2019 17:30
Last modified: 16 Mar 2024 03:22

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Contributors

Author: Andrew J. Durnford
Author: William Rodgers
Author: Mark A. Mullee
Author: Andrea Whitney
Author: Martin Prevett
Author: Lucy Kinton
Author: Matthew Harris
Author: William P. Gray

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