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Table 5 Pooled estimates for CRT reduction from baseline for PDT versus anti-VEGF

From: Photodynamic therapy versus anti-vascular endothelial growth factor agents for polypoidal choroidal vasculopathy: A meta-analysis

Outcome of interest

Studies (n)

WMD (95 % CI)

Test for Overall Effect

Study Heterogeneity

χ2

p

I2

CRT Reduction (3mo)

Design

      

 All trials

5

18.69 (−0.83, 38.20)

Z =1.88, P =0.061

2.36

0.670

0.00 %

 Retro

3

22.75 (−0.96, 44.54)

Z =1.05, P =0.141

1.56

0.459

0.00 %

 RCT

2

2.24 (−41.62, 46.09)

Z =0.10, P =0.920

0.13

0.719

0.00 %

Type of OCT

      

 TD-OCT

3

10.47 (−30.90, 51.85)

Z =0.50, P =0.620

1.29

0.526

0.00 %

 SD-OCT

2

21.03(−1.09, 43.17)

Z =1.86, P =0.062

0.88

0.348

0.00 %

CRT Reduction (6mo)

Design

 All trials

4

44.94 (16.44, 73.44)

Z =3.09, P =0.002

4.30

0.231

30.3 %

 Retro

2

36.87 (14.58, 59.16)

Z =3.24, P =0.001

0.65

0.421

0.00 %

 RCT

2

66.62 (3.42, 129.81)

Z =2.07, P =0.039

2.05

0.152

51.3 %

Type of OCT

      

 TD-OCT

2

22.15 (2.98, 67.30)

Z =2.06, P =0.038

0.17

0.678

0.00 %

 SD-OCT

2

62.13 (8.19, 116.07)

Z =2.26, P =0.024

3.08

0.079

67.5 %

CRT Reduction (12mo)

Design

 All trials

3

13.91(−42.14, 69.97)

Z =0.49, P =0.627

8.48

0.014

76.4 %

 Retro

2

36.03 (−13.52, 85.58)

Z =1.43, P =0.154

2.48

0.115

59.6 %

 RCT

1

13.91 (−42.14, 69.97)

Z =1.00, P =0.315

-

-

 

Type of OCT

      

 TD-OCT

1

1.35 (−60.65, 63.35)

Z =0.04, P =0.966

-

-

-

 SD-OCT

2

16.70 (−65.61, 99.00)

Z =0.40, P =0.691

6.92

0.009

85.6 %

  1. CRT central retinal thickness; PDT photodynamic therapy; VEGF vascular endothelial growth factor; WMD weighted mean differences; CI confidence interval; Retro retrospective comparative study; RCT prospective randomized controlled trial; OCT optical coherence tomography; TD-OCT time-domain optical coherence tomography; SD-OCT spectral-domain optical coherence tomography