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Changes in ETDRS letter scores from baseline.
Note: All the cases in the per-protocol set had lost <15 ETDRS letters at the 12-month examination (90% confidence interval, 0.854–1.000) (P<0.046, binomial one-sided test).
Abbreviations: BL, baseline; M, month(s); ETDRS, Early Treatment Diabetic Retinopathy Study.
