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. 2020 Dec 16;14:4385–4393. doi: 10.2147/OPTH.S286527

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© 2020 Zhang and Strauss.

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Standard deviation of change in Early Treatment Diabetic Retinopathy Study (ETDRS) Diabetic Retinopathy Severity Scale (DRSS) steps from baseline to month 3 by baseline DRSS. 1 = diabetic retinopathy (DR) severity level 10, 12 (DR absent); 2 = DR severity level 14A–14C, 14Z, 15, 20 (DR questionable, microaneurysms only); 3 = DR severity level 35A–35F (mild nonproliferative DR [NPDR]); 4 = DR severity level 43A, 43B (moderate NPDR); 5 = DR severity level 47A–47D (moderately severe NPDR); 6 = DR severity level 53A–53E (severe NPDR); 7 = DR severity level 60, 61A, 61B (mild proliferative DR [PDR]); 8 = DR severity level 65A–65C (moderate PDR).

Note: data are available from RIDE and RISE for 1, and 9-12 given incomplete data.