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Table 2 Changes of BCVA before and after surgery, stratified into different groups

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

Total number of patients (n) 151    
BCVA (logMAR) (mean (sd)) Before surgery After surgery Difference  
  0.42 (0.24) 0.19 (0.19) − 0.24
(0.23)
 
Stages of CB abnormalities Not present 1 2 3
n 110 24 8 9
Difference BCVA (logMAR) before/after surgery (mean (sd)) − 0.28 (0.24) − 0.14 (0.15) − 0.08 (0.20) − 0.18 (0.12)
Presence/absence of CB abnormality Present Not present   
n 110 41   
Difference BCVA (logMAR) before/after surgery (mean (sd)) − 0.28 (0.24) − 0.14 (0.15)   
Stages of ERM before surgery 1 2 3 4
n 43 38 42 28
Difference BCVA (logMAR) before/after surgery (mean (sd)) − 0.20 (0.29) − 0.27 (0.21) − 0.21 (0.19) − 0.28 (0.21)
  1. Top row: all eyes before vs. after surgery; 2nd row from top: stratified into different stages of CB abnormalities; 3rd row from top: all eyes showing CB abnormalities vs. those without; bottom row: stratified into different ERM stages prior to surgery)
  2. BCVA best corrected visual acuity, CB central bouquet, logMAR logarithm of the minimum angle of resolution