dc.contributor.author | Marotta, TR | |
dc.contributor.author | Fiorella, D | |
dc.contributor.author | Krings, T | |
dc.contributor.author | O'Kelly, CJ | |
dc.contributor.author | Joshi, MD | |
dc.date.accessioned | 2013-10-23T09:04:33Z | |
dc.date.available | 2013-10-23T09:04:33Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | AJNR Am J Neuroradiol. 2013 Aug;34(8):1589-92. doi: 10.3174/ajnr.A3431. Epub 2013 Feb 28. | en |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/pubmed/23449648 | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/57854 | |
dc.description.abstract | Abstract
Novel angiographic grading scales for the assessment of intracranial aneurysms treated with flow-diverting stents have been recently developed because previous angiographic grading scales cannot be applied to these aneurysms. The purpose of this study was to evaluate the inter- and intraobserver variability of the novel O'Kelly Marotta grading scale, which was developed specifically for the angiographic assessment of aneurysms treated with flow-diverting stents.
MATERIALS AND METHODS:
Multiple raters (n = 31) from the disciplines of neuroradiology and neurosurgery were presented with pre- and posttreatment angiographic images of 14 aneurysms treated with intraluminal flow diverters. Raters were asked to classify pre- and posttreatment angiograms by using the OKM grading scale. Statistical analyses were subsequently performed with calculation of a generalized multirater κ statistic for assessment of inter- and intraobserver variability and by performing a Wilcoxon signed rank sum test for assessment of group differences.
RESULTS:
Variability analysis of the OKM grading scale yielded substantial (κ = 0.74) and almost perfect (κ = 0.99) inter- and intraobserver agreement, respectively, with no statistically significant differences between raters with a background of neuroradiology versus neurosurgery or attending physician versus trainee.
CONCLUSIONS:
The OKM grading scale for the assessment of intracranial aneurysms treated with flow-diverting stents is a reliable grading scale that can be used equally well by users of varying backgrounds and levels of training. Comparison with interobserver variability of pre-existing angiographic grading scales shows equal or better performance. | en |
dc.language.iso | en | en |
dc.title | Observer variability of an angiographic grading scale used for the assessment of intracranial aneurysms treated with flow-diverting stents. | en |
dc.type | Article | en |
local.publisher | School of Medicine | en |