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Table 6 Methodological quality of studies reviewed (Modified Downs & Black)

From: What is the evidence to support early supervised exercise therapy after primary total knee replacement? A systematic review and meta-analysis

Author

Study Design

Reporting

External Validity

1

2

3

4

5

6

7

8

9

10

11

12

13

 

 Dujin, P., Jeonghee, K., & Hyunok, L.

Randomised Controlled Trial

1

1

1

1

1

1

1

0

1

0

0

0

1

 

 Hewitt, B., & Shakespeare, D.

Prospective non-randomised controlled trial (Quasi-Experimental)

0

0

0

1

1

1

1

1

1

1

1

1

1

 

 Kim, T., Park, K., Yoon, S., Kim, S., Chang, C., & Seong, S.

Randomised Controlled Crossover Trial

1

1

1

1

1

1

1

1

1

1

0

0

1

 

 Pongkunakorn, A., & Sawatphap, D

Prospective non-randomised controlled trial (Quasi-Experimental)

1

1

1

1

1

1

1

1

1

1

0

0

1

 

Author

Internal Validity Bias

Internal Validity Confounding

Power

Total Score

14

15

16

17

18

19

20

21

22

23

24

25

26

27

 

 Dujin, P., Jeonghee, K., & Hyunok, L.

0

0

1

1

1

1

1

1

1

1

0

1

1

1

20

 Hewitt, B., & Shakespeare, D.

0

0

1

1

1

1

0

1

1

0

0

1

1

0

18

 Kim, T., Park, K., Yoon, S., Kim, S., Chang, C., & Seong, S.

0

1

1

1

1

1

1

1

1

0

0

1

1

1

22

 Pongkunakorn, A., & Sawatphap, D

0

0

1

1

1

1

1

1

0

0

0

1

1

1

20