Aggressive Posterior Retinopathy of Prematurity: Clinical and Quantitative Imaging Features in a Large North American Cohort

Kellyn N. Bellsmith, James Brown, Sang Jin Kim, Isaac H. Goldstein, Aaron Coyner, Susan Ostmo, Kishan Gupta, R. V.Paul Chan, Jayashree Kalpathy-Cramer, Michael F. Chiang, J. Peter Campbell

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Abstract

Purpose: Aggressive posterior retinopathy of prematurity (AP-ROP) is a vision-threatening disease with a significant rate of progression to retinal detachment. The purpose of this study was to characterize AP-ROP quantitatively by demographics, rate of disease progression, and a deep learning-based vascular severity score. Design: Retrospective analysis. Participants: The Imaging and Informatics in ROP cohort from 8 North American centers, consisting of 947 patients and 5945 clinical eye examinations with fundus images, was used. Pretreatment eyes were categorized by disease severity: none, mild, type 2 or pre-plus, treatment-requiring (TR) without AP-ROP, TR with AP-ROP. Analyses compared TR with AP-ROP and TR without AP-ROP to investigate differences between AP-ROP and other TR disease. Methods: A reference standard diagnosis was generated for each eye examination using previously published methods combining 3 independent image-based gradings and 1 ophthalmoscopic grading. All fundus images were analyzed using a previously published deep learning system and were assigned a score from 1 through 9. Main Outcome Measures: Birth weight, gestational age, postmenstrual age, and vascular severity score. Results: Infants who demonstrated AP-ROP were more premature by birth weight (617 g vs. 679 g; P = 0.01) and gestational age (24.3 weeks vs. 25.0 weeks; P < 0.01) and reached peak severity at an earlier postmenstrual age (34.7 weeks vs. 36.9 weeks; P < 0.001) compared with infants with TR without AP-ROP. The mean vascular severity score was greatest in TR with AP-ROP infants compared with TR without AP-ROP infants (8.79 vs. 7.19; P < 0.001). Analyzing the severity score over time, the rate of progression was fastest in infants with AP-ROP (P < 0.002 at 30–32 weeks). Conclusions: Premature infants in North America with AP-ROP are born younger and demonstrate disease earlier than infants with less severe ROP. Disease severity is quantifiable with a deep learning-based score, which correlates with clinically identified categories of disease, including AP-ROP. The rate of progression to peak disease is greatest in eyes that demonstrate AP-ROP compared with other treatment-requiring eyes. Analysis of quantitative characteristics of AP-ROP may help improve diagnosis and treatment of an aggressive, vision-threatening form of ROP.

Original languageEnglish (US)
JournalOphthalmology
DOIs
StateAccepted/In press - Jan 1 2020

ASJC Scopus subject areas

  • Ophthalmology

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    Bellsmith, K. N., Brown, J., Kim, S. J., Goldstein, I. H., Coyner, A., Ostmo, S., Gupta, K., Chan, R. V. P., Kalpathy-Cramer, J., Chiang, M. F., & Campbell, J. P. (Accepted/In press). Aggressive Posterior Retinopathy of Prematurity: Clinical and Quantitative Imaging Features in a Large North American Cohort. Ophthalmology. https://doi.org/10.1016/j.ophtha.2020.01.052