Table 3

Sources Searched

Electronic sources searched in at least 10% of reviews

N

%


MEDLINE

105

100.0

Embase

93

88.6

Cochrane Controlled Trials Register or CENTRAL or review group registry

91

86.7

Science Citation Index or Social Science Citation Index

37

35.2

CINAHL

31

29.5

PsycLit

18

17.1

Cochrane Library (no section specified)

16

15.2

Biosis

12

11.4

Dissertation Abstracts

12

11.4

National Research Register

11

10.5


Non-electronic search techniques (all reported methods)


Cited references

91

86.7

Experts and/or authors or non-commercial organizations contacted

67

63.8

Contacted industry (pharmaceutical companies, manufacturers)

30

28.6

Hand searching (other than reference lists)

17

16.2

Own files

2

1.9

Print indices other than Index Medicus

2

1.9

Index Medicus

1

1.0

Subject Bibliography

1

1.0


Sampson et al. BMC Medical Research Methodology 2006 6:33   doi:10.1186/1471-2288-6-33

Open Data