Inter-rater reliability of published flow diversion occlusion scales.

Abstract:

BACKGROUND:With increasing use of flow-diverting stents for the treatment of intracranial aneurysms, standardized methods and a common language to evaluate angiographic outcomes are needed. Multiple grading scales have been developed for this purpose but none has been widely adopted. OBJECTIVE:To analyze these scales to determine interobserver reliability. METHODS:Four independent assessors scored the intraprocedural angiograms of patients who underwent flow-diverting stent deployment for an intracranial saccular or fusiform aneurysm at our institution between October 2012 and June 2015. Angiographic outcome immediately after flow-diverting stent deployment was scored using three grading scales (Kamran-Byrne (KB), Simple Measurement of Aneurysm Residual after Treatment (SMART), and O'Kelley, Krings, Marotta (OKM)). Statistical analysis was performed using Light's κ for multiple raters (κ), Kendall's coefficient of concordance (W), and intraclass correlation (ICC). RESULTS:We included the angiograms of 50 consecutive patients (mean age 58 years, range 30-79) who underwent flow-diverting stent deployment for an intracranial aneurysm (40 saccular, 10 fusiform). Six aneurysms were located in the posterior circulation. The inter-rater reliability was typically poor or fair: SMART aneurysm filling (κ=0.30, W=0.36, ICC=0.12), SMART parent vessel stenosis (κ=0.07, W=0.33, ICC=0.12), KB axis I (κ=0.24, W=0.50, ICC=0.25), KB axis II (κ=0.07, W=0.30, ICC=0.06), OKM aneurysm filling (κ=0.23, W=0.45, ICC=0.13), OKM contrast stasis (κ=0.36,W=0.71, ICC=0.54). CONCLUSIONS:Existing flow-diverting stent grading scales have low inter-rater reliability for most categories.

journal_name

J Neurointerv Surg

authors

Mazur MD,Taussky P,Shah LM,Winegar B,Park MS

doi

10.1136/neurintsurg-2015-012193

subject

Has Abstract

pub_date

2016-12-01 00:00:00

pages

1294-1298

issue

12

eissn

1759-8478

issn

1759-8486

pii

neurintsurg-2015-012193

journal_volume

8

pub_type

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