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  • Title: Color-code agreement among stratus, cirrus, and spectralis optical coherence tomography in relapsing-remitting multiple sclerosis with and without prior optic neuritis.
    Author: Rebolleda G, González-López JJ, Muñoz-Negrete FJ, Oblanca N, Costa-Frossard L, Álvarez-Cermeño JC.
    Journal: Am J Ophthalmol; 2013 May; 155(5):890-7. PubMed ID: 23398979.
    Abstract:
    PURPOSE: To evaluate the agreement of retinal nerve fiber layer (RNFL) color codes among Stratus, Cirrus, and Spectralis optical coherence tomography (OCT) in patients with relapsing-remitting multiple sclerosis. DESIGN: Prospective cohort study. METHODS: In 140 eyes from 70 patients having relapsing-remitting multiple sclerosis from January 2011 to September 2011, peripapillary RNFL thickness was measured using the fast RNFL program by Stratus, the optic disc cube protocol by Cirrus, and the N-site axonal analysis by Spectralis. RESULTS: Overall, a moderate to good RNFL color code agreement was found (0.435-0.884), except for the nasal quadrant. The temporal quadrant was the most abnormal color coding by both Cirrus (64.7%) and Spectralis (61.7%) in both the optic neuritis (ON) and non-ON group and by Stratus (58.8%) in the ON group. Abnormal temporal RNFL color-code rate was significantly higher in ON eyes than non-ON eyes by Cirrus (P < .001), Stratus (P < .001), and Spectralis (P = .030). Overall, Cirrus significantly displayed abnormal findings while both Stratus and Spectralis displayed normal results for the inferior quadrant (P < .05). On the other hand, Spectralis OCT showed a significantly higher rate of abnormal findings while Cirrus displayed normal results for the temporal quadrant in non-ON eyes (P < .001). CONCLUSIONS: We found a substantial color-code disagreement among devices in patients with relapsing-remitting multiple sclerosis regarding the ON antecedent. In non-ON eyes, Spectralis yielded a significantly higher thinning for temporal quadrant than Cirrus, suggesting that N-site axonal analysis could define axonal damage in relapsing-remitting multiple sclerosis patients earlier than conventional RNFL analysis.
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