Abstract
Background and objectives
The etiologic distribution and clinical features of diplopia may differ according to the specialties involved in the management. This study aimed to establish the clinical features and underlying etiologies of diplopia by recruiting patients from all departments.
Methods
We reviewed the medical records of 4127 patients with diplopia as the chief complaint, who had been recruited from all departments at Seoul National University Bundang Hospital, Seongnam, Republic of Korea, from 2003 to 2020.
Results
Diplopia was binocular in 3557 (94.2%) and monocular in 219 (5.8%) patients. The common causes of binocular diplopia included microvascular (n = 516, 14.5%), strokes (n = 412, 11.6%), neoplastic (n = 304, 8.5%), myasthenia gravis (n = 253, 7.1%), traumatic (n = 240, 6.7%), and decompensated phoria (n = 232, 6.5%), and comprised more than a half of the causes. Patients with binocular diplopia were usually managed by neurologists (2549/3557, 71.7%), followed by ophthalmologists (2247/3557, 63.2%), emergency physicians (1528/3557, 43.0%), neurosurgeons (361/3557, 10.1%), and others (271/3557, 7.6%). The etiologies of binocular diplopia differed markedly according to the patients’ age and the specialties involved in the management (p < 0.001).
Conclusions
Given the differences in the etiologic distribution of diplopia according to the patients’ age and the specialties involved in the management, the results of previous reports on the characteristics and etiology of diplopia, primarily performed in a single specialty department, should be interpreted with a possible selection bias.
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Data availability statement
Anonymized data will be shared by request from any qualified investigator.
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Funding
This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT (No. NRF-2021R1F1A1061527).
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HJK analyzed and interpreted the data and wrote the manuscript. HJK, JYC, HKY, JMH, HJK, and JSK analyzed and interpreted the data and revised the manuscript. JSK designed and conceptualized the study, interpreted the data, and revised the manuscript.
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Dr. J. S. Kim serves as an associate editor of Frontiers in Neuro-otology and on the editorial boards of the Journal of Clinical Neurology, Frontiers in Neuro-ophthalmology, Journal of Neuro-ophthalmology, Journal of Vestibular Research, Journal of Neurology, and Medicine. The other authors have nothing to disclose.
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This study followed the tenets of the Declaration of Helsinki and was performed according to the guidelines of the Institutional Review Board of Seoul National University Bundang Hospital (B-2109–707-001).
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Kim, HJ., Kim, HJ., Choi, JY. et al. Diplopia: characteristics and etiologic distribution in a referral-based university hospital. J Neurol 270, 1067–1075 (2023). https://doi.org/10.1007/s00415-022-11471-7
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DOI: https://doi.org/10.1007/s00415-022-11471-7