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Table 1 Study characteristics of all included studies

From: Posterior cruciate ligament repair seems safe with low failure rates but more high level evidence is needed: a systematic review

Author

Year

LOE

Prospective/retrospective

Study design

Surgery type

MINROS

Open/arthroscopic

Suture augmentation

1

2

3

4

5

6

7

8

Total

Heitmann et al

2019

IV

Prospective

Case series

Open

Yes

2

2

2

2

1

1

1

1

12

Hopper et al

2021

IV

Prospective

Case series

Arthroscopic

Yes

2

2

2

2

0

2

1

1

12

Hua et al

2016

IV

Retrospective

Case series

Open

No

2

2

1

2

0

2

1

0

10

Kohl et al

2015

IV

Prospective

Case series

Open

No

2

2

2

2

0

1

0

0

9

Otto et al

2020

IV

Retrospective

Case series

Arthroscopic (11/14)

Yes

2

1

1

2

0

1

1

2

10

Owens et al

2007

IV

Retrospective

Case series

Open

No

2

2

1

2

0

2

1

1

11

Shirakura et al

2001

III

Retrospective

Cohort

Open

No

2

2

1

1

0

2

0

0

8

Vermeijden et al

2020

III

Retrospective

Cohort

Arthroscopic

Yes

2

2

1

1

0

2

2

0

10

Wheatley et al

2002

IV

Retrospective

Case series

Arthroscopic

No

2

2

1

2

0

2

0

0

9

  1. LOE Level of evidence, MINORS Methodological Index for Non-randomized Studies
  2. The 8 items of the MINORS; 0 = not reported; 1 = reported but inadequate; 2 = reported and adequate:
  3. 1. A clearly stated aim
  4. 2. Inclusion of consecutive patients
  5. 3. Prospective collection of data
  6. 4. Unbiased assessment of the study end point
  7. 5. Follow-up period appropriate to the aim of the study
  8. 6. Loss to follow-up less than 5%
  9. 8. Prospective calculation of the study size