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Risk factors for radiation‐induced optic neuropathy: a case–control study
Author(s) -
Ferguson Ian,
Huecker Julie,
Huang Jiayi,
McClelland Collin,
Van Stavern Gregory
Publication year - 2017
Publication title -
clinical and experimental ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.3
H-Index - 74
eISSN - 1442-9071
pISSN - 1442-6404
DOI - 10.1111/ceo.12927
Subject(s) - medicine , optic neuropathy , retrospective cohort study , univariate analysis , radiation therapy , risk factor , pediatrics , surgery , multivariate analysis , optic nerve , ophthalmology
Importance Identifying risk factors for radiation‐induced optic neuropathy (RION) could promote a more conservative approach to radiation treatment planning in vulnerable patients. Background This study explored possible factors beyond radiation dose associated with the development of RION after external beam radiation therapy. Design This was a retrospective case–control study conducted at a university hospital tertiary care center. Participants Cases ( n = 14) meeting criteria for a diagnosis of RION by neuro‐ophthalmologic exam were identified from a single‐centre neuro‐ophthalmology database. Controls ( n = 31) without RION were selected from a single‐centre radiation oncology database. Methods Controls were matched to cases based upon maximum radiation dose to the optic apparatus. Patient characteristics and treatment parameters were interrogated by univariate analysis for attributes predisposing to RION. Main Outcome Measures The primary parameter was a significant association of patient characteristics or treatment parameters with RION. Results Controlling for radiation dosage, no significant associations for alternative risk factors were identified. Conclusions and Relevance These results support the literature suggesting that the primary risk factor for developing RION is radiation dosage and that additional patient‐related and tumour‐related risk factors may play only a minor role.