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Table 1 Distribution of the different stages of alterations of the central bouquet and epiretinal membranes before and after surgery

From: Epiretinal membrane surgery outcome in eyes with abnormalities of the central bouquet

Stages of CB alteration 0 (no CB alteration) 1 2 3  
Baseline 110 (72.8%) 24 (15.9%) 8 (5.3%) 9 (6.0%)  
End of follow-up 127 (84.1%) 18 (11.9%) 3 (2.0%) 3 (2.0%)  
Stages of ERM 0 (no ERM) 1 2 3 4
Baseline 0 43 (28.5%) 38 (25.2%) 42 (27.8%) 28 (18.5%)
End of follow-up 149 (98.7%) 1 (0.7%) 0 1 (0.7%) 0
  1. Top row: Distribution of CB alteration stages at baseline and after surgery. Bottom row: Distribution of ERM stages at baseline and after surgery. Remaining ERMs fragments were detected in the OCT follow-up exam after surgery in only two patients. In both cases the ERM stage was worse before than after the procedure. The mean BCVA was 20/50 (0.42 logMAR) before and 20/32 (0.19 logMAR) after the procedure indicating a significant mean gain in vision of almost 2.5 lines (95% CI 0.20–0.28; p < 0.001) (Fig. 3). No significant difference in BCVA was observed comparing surgeries including cataract removal to those without (p = 0.349). Patients who showed foveal changes prior to surgery had less BCVA increase than patients classified as CBA 0 (0.28 vs. 0.14 logMAR; p = (p < 0.001) (Table 2). Looking at the different stages of ERMs before surgery, vision gain was distributed almost equally between the stages, reaching no statistical significance. However, greatest improvement was reached by stage 4 ERM eyes after removal of the membrane (mean vision gain = 0.28), the smallest by ERM stage 1 eyes (mean vision gain = 0.2) (Fig. 4)
  2. CB central bouquet, ERM epiretinal membrane