Table 4 Comparison of DF/DD ratio among three groups.

From: Biometric analysis of disc-fovea distance and optic disc diameter in premature infants using wide-field fundus imaging

 

Group 1

Group 2

Group 3

p-value

Post-Hoc (Bonferroni)

n

Mean

SD

n

Mean

SD

n

Mean

SD

Group 1 vs. 2

Group 1 vs. 3

Group 2 vs. 3

DF/DD ratio

 PMA 34 weeks

28

3.28

0.32

30

3.29

0.30

32

3.27

0.27

0.952

 > .999

 > .999

 > .999

 PMA 35 weeks

26

3.13

0.42

28

3.24

0.27

34

3.30

0.25

0.133

0.674

0.138

 > .999

 PMA 36 weeks

27

3.26

0.26

29

3.23

0.27

26

3.09

0.42

0.127

 > .999

0.174

0.322

 PMA 37 weeks

27

3.22

0.31

28

3.25

0.30

34

3.23

0.25

0.951

 > .999

 > .999

 > .999

 PMA 38 weeks

25

3.29

0.30

30

3.18

0.26

27

3.19

0.22

0.249

0.399

0.479

 > .999

 PMA 39 weeks

27

3.26

0.29

25

3.18

0.34

25

3.13

0.24

0.246

0.937

0.296

 > .999

 PMA 40 weeks

27

3.23

0.32

27

3.05

0.21

36

3.16

0.26

0.038*

0.035*

0.835

0.297

  1. *A p-value < 0.05 was considered statistically significant. The DF/DD ratio of PMA 40 weeks showed a significant difference between Group 1 and 2 (p = 0.035). DF/DD ratio = disc-fovea distance / mean optic disc diameter.
Back to article page