Evidence-Based Complementary and Alternative Medicine / 2013 / Article / Tab 2

Review Article

The Effect of Qigong on Depressive and Anxiety Symptoms: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Table 2

Quality assessment of the included studies.

Studies Randomization
employed
Randomization methodsInclusion and exclusion criteriaOutcome assessors blindedWithdrawal and dropoutsSample size estimation Intention-
to-treat analysis
Intervention describedQualification of the trainer

Chan et al., 2012 [28]YNYYYNYYY
Chan et al., 2011 [29]YBlock randomizationYYNInappropriate*NAYY
Cheung et al., 2005 [30]YA randomization list prepared by a statistician YNYYYYY
Liu et al., 2012 [31]YRandom digit number tableYNYNNYY
Ma et al., 2011 [32]YNYNNNNAYN
Qiu, 2011
[33]
YRandom digit number tableYNNNNAYY
Tsang et al., 2003 [37]YDrawing of lots YNYYYYY
Stenlund et al., 2009 [34]YComputer-generated number YYYNYYY
Tsang et al., 2012 [35]YNYYYYNYY
Tsang et al., 2006 [36]YNNNNNNAYY
Wang et al., 2010 [38]YNNNNNNAYN
Wang, 2008 [39]YComputer-generated number YNYNNYY

N: not reported; NA: not applicable; Y: yes. *Sample size was not calculated according to power and effect size.

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