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Table 3 Summary of study quality assessment

From: Physical Activity Following Hip Arthroscopy in Young and Middle-Aged Adults: A Systematic Review

   

Internal Validity

 

External Validity

Performance

Detection

Attrition

Selection bias/control of confounding

Study

Representative

✓

1Participation rate

✓

Direct observation

✓

PROM-validity/reliability

✓

2Direct measure - validity/ reliability

Blinded assessors

✓

3Outcome measure

✓

1Completeness

✓

4Age

✓

Location

✓

5Sex

✓

6Severity of Joint disease

✓

7Follow-up

✓

Single site &/or surgeon(YES)

LOE

RCTs

n=2

2

2

2

2

NA

2

2

0

1

2

0

2

1

1

2

Prospective studies, more than 1 arm

n=13

10

13

13

9

1

1

13

11

3

12

8

10

1

12

3

Prospective studies, Single-arm

n=11

5

6

10

7

NA

1

11

8

2

11

3

7

1

9

3/4

Retrospective studies, more than1 arm

n=53

41

48

53

2

NA

1

49

43

3

52

37

44

2

51

4

Retrospective studies, Single-arm

n=41

32

40

40

6

NA

1

40

35

3

40

7

35

0

38

4

  1. RCTs randomised controlled trials, LOE level of evidence (Oxford Centre for Evidence-Based Medicine [31]), PROM patient-reported outcome measure.
  2. ✓ indicates the measure was adequately addressed in the study
  3. 1✓ percent participation/ completion was 80% or more.
  4. 2NA indicates no direct measure of PA used
  5. 3✓ indicates same method of ascertainment was used for all participants
  6. 4✓ if range within 18–50
  7. 5✓ if sex is balanced (10% or less difference) or adjusted for in analysis
  8. 6✓ if severity of OA identified in the study
  9. 7✓ where FU is the same for all study participants or lies within 10%, i.e. the following acceptable ranges: 1 year follow-up = 1 month each way; 2 years follow-up = 2 months; 3 years follow-up = 3 months……10 years = 10 months
  10. LOE=Level of evidence (Oxford Centre for Evidence-Based Medicine [31]); PROM=patient-reported outcome measure