Authors (years of publication) | Bias due to confounding | Bias in selection of participants into the study | Bias in classification of interventions | Bias due to deviations from intended interventions | Bias due to missing data | Bias in measurement of outcomes | Bias in selection of the reported result | Overall bias |
---|---|---|---|---|---|---|---|---|
Thiruvenkatachari et al., 2006 [38] | Low | Moderate | Low | Low | Low | Serious | Low | Serious |
Hedayati et al., 2007 [37] | Low | Moderate | Low | Low | Low | No information | Low | Moderate |
Thiruvenkatachari et al., 2008 [39] | Low | Moderate | Low | Low | Low | Serious | Low | Serious |
Borsos et al.,2012 [15] | Low | Low | Low | Low | Low | Low | Low | Low |
Chaudhary et al., 2014 [40] | Low | Low | Low | Low | Low | Serious | Low | Serious |