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Table 3 The Newcastle–Ottawa-scale of non-randomized controlled studies

From: The efficacy and safety of direct superior approach (DSA) for total hip arthroplasty: a systematic review and meta-analysis

Inclusion in studies

Selection of study subjects

Comparability between groups

Outcome measures

Scores

1

2

3

4

a

b

c

Leonard [14]

*

*

*

*

 

*

*

 

6*

Eustathios [15]

*

*

*

*

*

*

*

 

7*

Denis [16]

*

*

*

*

*

*

*

 

7*

Matthew [17]

*

*

*

*

*

*

*

 

7*

Bouke [18]

*

*

*

*

 

*

*

 

6*

  1. ‡: 1. Representation of exposed groups, 2. Selection of non-exposed queues, 3. Determination of exposure factors, 4. No outcome indicators to observe at the start of the study, a. Evaluation of closing indicators, b. Adequate follow-up time(Follow-up time ≥ 5 years.), c. Completeness of follow-up in the exposed and non-exposed groups
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X