Abstract
Purpose
To investigate whether previously reported seasonal variation and winter-dominant prevalence of acute massive submacular hemorrhages (SMHs) caused by age-related macular degeneration (AMD) disappeared, and those caused by retinal microaneurysms (RMAs) emerged.
Method
The medical charts of 95 patients (95 eyes) with SMH caused by AMD and 76 patients (76 eyes) with SMH caused by RMAs in 2012–2019 were retrospectively reviewed. For each subject, the month of onset, the mean ambient temperature of that month were recorded.
Results
The monthly numbers of cases of SMHs caused by AMD from January to December were 6, 8, 4, 9, 7, 10, 9, 11, 7, 11, 3, and 10. No significant seasonal variation in the monthly incidence was identified (Roger’s R = 1.89, p = 0.39). The monthly numbers of SMHs caused by RMAs from January to December were 3, 11, 11, 8, 7, 8, 5, 5, 2, 4, 7, and 5. There was significant seasonal variation in the monthly incidence (Roger’s R = 7.67, p = 0.02). There was no significant correlation between the monthly incidence of SMHs caused by RMAs and mean ambient temperature.
Conclusion
Our previous study conducted for cases obtained in 1998–2005 showed seasonal cyclic trend in the number of SMHs caused by AMD, with the peak in winter. However, that significant seasonal variation disappeared in 2012–2019 in the present study. Common usage of OCT devices and anti-VEGF drugs might be the reason for the lack of seasonal variation in the cases of SMH caused by AMD.
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Acknowledgements
The authors thank Ms. Kumi Fujiwara, Mr. Keigo Omori, and Ms. Waka Miyagi for technical assistance. We thank Claire Barnes, PhD, from Edanz Group (https://en-author-services.edanz.com/ac) for editing a draft of this manuscript.
Funding
This work was partially supported by Grants-in-Aid for Scientific Research (C) (H.K., 19K09988) from JSPS KAKENHI (http://www.jsps.go.jp/), the Eye Research Foundation for the Aged (ERFA, H.K.), Charitable Trust Fund for Ophthalmic Research in Commemoration of Santen Pharmaceutical’s Founder (H.K.), Bayer Retina Award Foundation (H.K.), Ichihara International Scholarship Foundation (H.K.), and Aichi Health Promotion Foundation (H.K.).
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Acquisition of data: H.K., N.T., Y.I.
Analysis and interpretation of data: H.K., M.M.
Drafting of manuscript: H.K., M.M., H.Y.
Critical revision: J.T., H.T., H.Y., K.M.N.
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The procedures adhered to the tenets of the World Medical Association’s Declaration of Helsinki. The Nagoya University Hospital ethics review board approved this retrospective analysis of patient records. The review board waived the requirement for informed consent because of the retrospective nature of the study.
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All authors have approved the manuscript and agree with submission to Graefe’s Archive for Clinical and Experimental Ophthalmology.
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Kaneko, H., Takashi, N., Matsunaga, M. et al. Seasonal variation in submacular hemorrhages in retinal macroaneurysms and its disappearance in age-related macular degeneration . Graefes Arch Clin Exp Ophthalmol 259, 3589–3596 (2021). https://doi.org/10.1007/s00417-021-05280-3
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DOI: https://doi.org/10.1007/s00417-021-05280-3