Table 1

Characteristics of included studies.

n (total = 61)

%


Year of publication or substantive update

Median

2001

Interquartile range

1999–2001

Focus of the review

Treatment

52

85.2

Prevention

7

11.5

Diagnosis

1

1.6

Other

1

1.6

Study designs included

RCT only

33

54.1

RCT and quasiRCT

24

39.3

RCT and other controlled trials

4

6.6

Number of included studies per review

Median

12

Interquartile range

5.5–19.5

Review Group

Musculoskeletal Injuries

13

21.3

Eyes and Vision

11

18.0

Renal

6

9.8

Prostatic Diseases and Urologic Cancers

5

8.2

Back

4

6.6

Upper Gastrointestinal and Pancreatic Diseases

3

4.9

Skin

3

4.9

Other

16

30.0


Zhang et al. BMC Medical Research Methodology 2006 6:23   doi:10.1186/1471-2288-6-23

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