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Table 2 Assessment of the quality of the included studies using the Joanna Briggs Institute’s (JBI) scale

From: Cell therapy for retinal degenerative disorders: a systematic review and three-level meta-analysis

Year

Author

Criteria and Corresponding Score

Overall

#1

#2

#3

#4

#5

#6

#7

#8

#9

2015

Song

1

1

1

1

1

1

1

1

NA

8

2015

Park

1

1

1

0

1

1

1

1

0

7

2016

Limoli

1

1

1

0

1

1

1

1

1

8

2017

Cotrim

1

1

1

0

1

0

1

1

0

6

2017

Kumar

1

1

1

1

1

1

1

1

1

9

2018

Da Cruz

1

1

1

0

1

1

1

1

1

8

2018

Kashani

1

1

1

1

1

0

1

1

NA

7

2018

Liu

1

1

1

1

1

1

1

1

NA

8

2018

Oner

1

1

1

1

1

1

1

1

NA

8

2019

Heier

1

1

1

1

1

0

1

1

NA

7

2020

Cotrim

1

1

1

1

1

1

1

1

1

9

2020

Nittala

1

1

0

1

1

1

1

1

1

8

2020

Sung

1

1

1

0

1

1

1

1

NA

7

2021

Kashani

1

0

1

0

1

1

1

1

NA

6

2021

Li

1

1

1

1

1

0

1

1

1

8

2021

Tuekprakhon

1

1

1

1

1

1

1

1

1

9

2021

Wiacek

1

1

1

1

1

1

1

1

1

9

2023

Brant Fernandes

1

1

1

0

1

1

1

1

1

8

  1. #1 Is it clear in the study what is the ‘cause’ and what is the ‘effect’ (i.e. there is no confusion about which variable comes first)? #2 Were the participants included in any comparisons similar? #3 Were the participants included in any comparisons receiving similar treatment/care, other than the exposure or intervention of interest? #4 Was there a control group? #5 Were there multiple measurements of the outcome both pre and post the intervention/exposure? #6 Was follow up complete and if not, were differences between groups in terms of their follow up adequately described and analyzed? #7 Were the outcomes of participants included in any comparisons measured in the same way? #8 Were outcomes measured in a reliable way? #9 Was appropriate statistical analysis used? NA not applicable/unclear