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Table 2 Risk of bias of the included studies

From: Yoga for schizophrenia: a systematic review and meta-analysis

 

Selection bias:

Performance bias:

Attrition bias:

Reporting bias:

Detection bias:

 

Author, year

Adequate random sequence generation

Adequate allocation concealment

Similar baseline characteristics

Adequate participant blinding

Adequate provider blinding

Similar or no co-interventions

Acceptable compliance

Acceptable and described drop-out rate

Inclusion of an intention-to-treat analysis

No selective outcome reporting

Adequate outcome assessor blinding

Similar timing of outcome assessment

Total: (max. 12)a

Behere et al., 2011 [41] Varambally et al., 2012 [42]

Yes

Yes

Yes

No

No

Yes

Unclear

No

No

Unclear

Yes

Yes

6

Duraiswamy et al., 2007 [43]

Yes

Unclear

Yes

No

Unclear

Yes

Unclear

No

No

Yes

Yes

Yes

6

Vancamport et al., 2011 [44]

Yes

Unclear

Unclear

Unclear

Unclear

Unclear

Yes

No

No

Yes

Unclear

Yes

4

Visceglia et al., 2011 [45]

Yes

Unclear

Yes

No

Unclear

Unclear

Unclear

Unclear

Unclear

Yes

Yes

Yes

5

Xie et al., 2006 [46]

Yes

Unclear

Yes

No

Unclear

Yes

Unclear

No

No

Yes

Unclear

Yes

5

  1. aHigher scores indicate lower risk of bias.