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Table 2 Quality assessment of nonrandomized studies (Methodological Index for Nonrandomized Studies)

From: Diabetes mellitus does not increase the risk of knee stiffness after total knee arthroplasty: a meta-analysis of 7 studies including 246 053 cases

MINORS criteria

Cartwright-Terry et al. [18] 2018

Clement et al. [17] 2018

Dowdle et al. [19] 2018

Issa et al. [8] 2015

Pfefferle et al. [16] 2014

Gandhi et al. [4] 2006

Meding et al. [12] 2003

A clearly stated aim

2

2

2

2

2

2

2

Inclusion of consecutive patients

2

2

2

2

2

2

2

Prospective collection of data

2

1

0

0

0

0

0

Endpoints appropriate to the aim of the study

2

2

2

2

2

2

2

Unbiased assessment of the study endpoint

0

0

0

0

0

0

0

Follow-up period appropriate to the aim of the study

2

2

2

2

2

2

2

Loss to follow-up less than 5%

2

0

2

1

2

2

1

Prospective calculation of the study size

1

1

2

1

2

1

2

An adequate control group

2

1

1

2

2

2

2

Contemporary groups:

2

2

2

2

2

2

2

Baseline equivalence of groups

2

2

2

1

2

2

1

Adequate statistical analyses

2

2

2

2

2

2

2

Total score

21

17

19

17

20

19

18

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Knee Surgery & Related Research

ISSN: 2234-2451