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Table 2 Differences between preoperative and postoperative BCVA values by group

From: Comparison of pre-chop technique using a reverse chopper and classic stop-and-chop technique in the treatment of high myopia associated with nuclear cataract

 

Pre-chop group

Stop-and-chop group

p-valuea

Eye (n)

22

22

 

A. Preoperative BCVA

0.14 ± 0.09

0.15 ± 0.08

0.888

B. On postoperative day 1

0.32 ± 0.13

0.22 ± 0.13

0.011

C. On postoperative day 7

0.58 ± 0.14

0.49 ± 0.15

0.032

Difference between A and B

0.18 ± 0.11

0.07 ± 0.11

0.002

p-value (A vs. B)b

< 0.0001

0.004

 

Difference between A and C

0.44 ± 0.12

0.34 ± 0.13

0.012

p-value (A vs. C)b

< 0.0001

< 0.0001

 

Difference between B and C

0.26 ± 0.15

0.27 ± 0.12

0.826

p-value (B vs. C)b

0.0001

0.0001

 
  1. BCVA best corrected visual acuity
  2. aDifference between two groups (Pre-chop group and Stop-and-chop group), used independent t test
  3. bDifference between preoperative and postoperative BCVA using paired Student’s T test
  4. aIndependent t test
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