Review Article
A Systematic Review and Meta-Analysis of Qigong for the Fibromyalgia Syndrome
Table 2
Risk of bias summary: review authors' judgments about each risk of bias item for each included study.
| | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias | | (selection bias) | (selection bias) | (performance bias) | (detection bias) | (attrition bias) | (reporting bias) |
| Astin et al., 2003 [33] | + | + | ? | + | − | + | + |
Haak and Scott,2008 [34] | ? | ? | ? | + | + | − | + | Liu et al., 2012 [35] | ? | ? | − | + | + | + | + | Lynch et al., 2012 [36] | + | ? | ? | + | + | + | + | Maddali Bongi et al., 2012 [37] | + | + | ? | + | + | + | + |
Mannerkorpi and Arndorw,2004 [39] | ? | ? | ? | + | − | + | + | Stephens et al., 2008 [38] | + | + | ? | + | − | + | + |
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“+” means low risk, “−” means high risk, and “?” means unclear risk of bias.
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