Terence, Katherine; Cundy, Olivia; Kellett, Salomey; Dick, Andrew D; Rahi, Jugnoo; Solebo, Ameenat Lola; (2023) Limited Utility of Keratic Precipitate Morphology as an Indicator of Underlying Diagnosis in Ocular Inflammation. Ocular Immunology and Inflammation 10.1080/09273948.2023.2242946. (In press).

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Abstract

Objectives: We aimed to establish the degree of consensus among clinicians on descriptors of KP morphology.// Methods: A web-based exercise in which respondents associated KP descriptors, as identified through a scoping review of the published literature, to images from different disorders. Inter-observer agreement was assessed using the Krippendorff kappa alpha metric.// Results: Of the 76 descriptive terms identified by the scoping review, the most used included “mutton-fat” (n = 93 articles, 36%), “fine/dust” (n = 76, 29%), “stellate” (n = 40, 15%), “large” (n = 33, 12%), and “medium” (n = 33, 12%). The survey of specialists (n = 26) identified inter-observer agreement for these descriptors to be poor (“stellate,” kappa: 0.15, 95% confidence interval 0.13–0.17), limited (“medium”: 0.27, 95% CI 0.25–0.29; “dust/fine”: 0.36, 95% CI 0.34–0.37), or moderate (“mutton fat”: 0.40, 95% CI 0.36–0.43; “large”: 0.43, 95% CI 0.39–0.46).// Conclusion: The clinical utility of KP morphology as an indicator of disease classification is limited by low inter-observer agreement.//

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