Comparison of the Effectiveness of Pars Plana Vitrectomy with and without Internal Limiting Membrane Peeling for Idiopathic Retinal Membrane Removal: A Meta-Analysis

Table 2

Characteristics of the included trials.

Study

Country

Study design

Pts/eyes ()

Mean age (year)

Gender (M/F)

Follow-up (mo)

Preoperative BCVA

E

E+I

E

E+I

E

E+I

E

E+I

E

E+I

Kim et al., 2005 [19]

Korea

Retrospective comparative

17

17

61.6 (43~78)

63.5 (48~79)

7/10

12/5

11.2 (6~27)

8.9 (6~11)

0.71 ± 0.50

0.71 ± 0.16

Kwok et al., 2005 [25]

Hong Kong

Retrospective

15

20

67.9 ± 8.0

63.9 ± 9.3

13/2

2/18

50.2 ± 18.0

23.6 ± 5.4

0.90 ± 0.293

0.652 ± 0.429

Liu and Mori, 2005 [24]

Japan

Retrospective

20

18

68.2 ± 6.9

69.4 ± 5.7

9/11

9/9

>3 months

0.35 ± 0.26

0.44 ± 0.21

Lee and Kim, 2010 [18]

Korea

Retrospective

19

21

65.47 ± 7.66

63.43 ± 7.18

3/16

4/17

18.32 ± 12.03

18.05 ± 11.81

0.67 ± 0.34

0.68 ± 0.21

Pournaras et al., 2011 [17]

Switzerland

Retrospective

15

24

77.1 ± 6.7

73.3 ± 10.6

7/8

13/11

41.9 ± 35.6

24.0 ± 12.6

0.48 ± 0.22

0.58 ± 0.40

Chang et al., 2013 [23]

America

Retrospective

40

40

70.5

70.1

—

—

3 months

0.44 ± 0.18

0.52 ± 0.31

Oh et al., 2013 [16]

Korea

Retrospective

23/23

20/20

64.0

65.3

10/13

7/13

>12 months

0.35 ± 0.16

0.44 ± 0.21

Ahn et al., 2014 [22]

Korea

Retrospective

65/69

37/40

63.9 ± 11.1

64.3 ± 10.0

32/37

18/22

>6 months

0.31 ± 0.21

0.38 ± 0.19

E: epiretinal membrane peeling only.
E+I: epiretinal membrane + internal limiting membrane peeling.