Table 4

Results of quality assessment of accepted trials

Article

DS

Selection bias

Detection/Performance bias

Attrition bias

Trial outcome


Randomization

Baseline data

Blinding/Masking

Loss-to-follow up

Run-in phase


Oba et al., 2009 [32]

01

0

0

0

A

A

A

Barja-Fidalgo et al., 2009 [33]

02

0

A

0

A

A

A

03

0

A

0

A

A

A

Karlzén-Reuterving and van Dijken, 1995 [20]

04

0

0

0

A

A

A

Arrow and Riordan, 1995 [21]

05

0

0

0

A

A

A

Williams et al., 1996 [22]

06

0

0

0

B

A

A

07

0

0

0

A

A

A

Rock et al., 1996 [23]

08

0

0

0

A

A

A

09

0

0

0

A

A

A

10

0

0

0

B

A

A

11

0

0

0

A

A

A

Kerrvanto-Seppälä et al., 2008 [24]

12

0

0

0

B

A

A

Beiruti et al., 2006 [26]

15

0

A

0

A

A

A

16

0

A

0

A

A

A

17

0

A

0

B

A

A

18

0

A

0

B

A

A

19

0

A

0

A

A

A

Poulsen et al., 2006 [27]

20

0

0

0

A

A

A

21

0

0

0

A

A

A

Forss and Halme, 19981 [28]

22

0

0

0

A

A

A

Mejàre and Mjör, 1990 [29]

24

0

0

0

B

A

A

25

0

0

0

B

A

A

Boksmann et al., 1987 [30]

26

0

0

0

A

A

A

Poulsen et al., 2001 [31]

27

0

0

0

A

A

A

Forss et al., 19941 [37]

28

0

0

0

A

A

A

Williams and Winter, 1981 [38]

30

0

0

0

0

A

A

Songpaisan et al., 1995 [25]

13

0

A

0

n.e.

A

0

14

0

A

0

n.e.

A

0

Forss and Halme, 19981 [28]

23

0

0

0

n.e.

A

0

Forss et al., 19941 [37]

29

0

0

0

n.e.

A

0


DS = Dataset number, n.e. = Not evaluated.

1 Different datasets reported from same trial

Mickenautsch and Yengopal BMC Research Notes 2011 4:22   doi:10.1186/1756-0500-4-22

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