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Table 2 The risk of bias of included studies

From: Collaborative care for patients with depression and diabetes mellitus: a systematic review and meta-analysis

Studies

Year

Selection bias

Performance bias

Detection bias

Attrition bias

Reporting bias

Other bias

  

Random sequence generation

Allocation concealment

Blinding of participants and personnel

Blinding of outcome assessment

Incomplete outcome data

Selective reporting

Anything else, ideally prespecified

Bogner et al. [26]

2012

U

U

H

U

L

U

U

Bogner et al. [27]

2010

U

U

H

U

L

U

U

Ciechanowski et al. [31]

2006

L

U

H

L

L

L

U

Ell et al. [32]

2011

L

L

H

L

L

L

U

Katon et al. [19]

2010

U

L

H

L

U

L

U

Katon et al. [23]

2004

L

L

H

L

U

L

U

Kinder et al. [33]

2006

U

U

H

U

L

L

U

Williams Jr et al. [28]

2004

L

L

H

L

L

L

U

  1. H high risk of bias, L low risk of bias, U unclear risk of bias.