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Table 1 Results of screening for randomized clinical trials from 2005 to 2012

From: The quality of reports of randomized clinical trials on traditional Chinese medicine treatments: a systematic review of articles indexed in the China National Knowledge Infrastructure database from 2005 to 2012

 

2005

2006

2007

2008

2009

2011

2012

Records identified through database searching

2040

2142

2795

3595

3706

6072

5874

Duplicated papers

3

6

6

22

80

24

83

Reviews

347

387

609

773

717

1176

1255

Experience

148

146

209

242

275

785

530

Literature analysis

30

36

26

39

59

93

72

Animal experiments

22

20

17

20

18

15

12

Not randomized

512

540

648

679

772

1083

1076

Retrospective study

3

13

16

25

17

23

86

Case report

20

38

47

80

77

189

156

Others

244

257

548

704

648

1342

1085

Full-text articles assessed for eligibility

711

699

669

1011

1043

1342

1519

Studies included in final review

711

699

669

1011

1043

1342

1519