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Table 2 Study quality score by modified Jadad score

From: Endoscopic versus open carpal tunnel release for idiopathic carpal tunnel syndrome: a meta-analysis of randomized controlled trials

Study included

Study design

Randomization

Blind method

Allocation concealment

Withdraw and dropout

Revised Jadad score

Level of evidence

Agee 1992

RCT

1

1

0

1

3

II

Brown 1993

RCT

2

1

0

1

4

II

Sennwald and Benedetti 1995

RCT

2

1

0

1

4

II

Dumontier 1995

RCT

2

1

0

1

4

II

Jacobsen 1996

RCT

1

1

0

1

3

II

MacDermid 2003

RCT

2

1

0

1

4

II

Ferdinand 2002

RCT

2

1

0

1

4

II

Trumble 2002

RCT

2

2

0

0

4

II

Wong 2003

RCT

2

2

0

1

5

II

Atroshi 2006

RCT

2

1

0

1

4

II

Soichi Ejiri 2012

RCT

2

2

0

0

4

II

Larsen 2013

RCT

2

2

0

1

4

II

Ho Jung Kang 2013

RCT

2

2

1

1

5

II