Table 4 Quality appraisal for intervention studies
Source | Type of study | Selection bias | Performance bias | Detection bias | Attrition bias | Reporting bias | Â | |
|---|---|---|---|---|---|---|---|---|
1. Random sequence generation | 2. Allocation concealment | 3. Blinding of participants and personnel | 4. Blinding of outcome assessment | 5. Incomplete outcome data | 6. Selective reporting | 7. Other bias | ||
Banerji et al. 2010 [29] | Retrospective analysis of the GALIANT study which is a multicenter, randomised, open-label study | LR | HR | HR | HR | LR | UR | HR |
Barnett et al. 2013 [31] | Randomised, double-blind, placebo-controlled trial | LR | LR | LR | UR | LR | LR | UR |
Barzilai et al. 2011 [30] | Randomised, double-blind, placebo-controlled trial | LR | LR | LR | UR | LR | UR | UR |
Chien et al. 2011 [32] | Randomised, open-labelled, parallel-group study | UR | UR | UR | HR | UR | UR | HR |
Ferrannini et al. 2009 [54] | Multicentre, randomised, double-blind, active-controlled study | UR | UR | UR | UR | LR | UR | HR |
Fonseca et al. 2008 [56] | Multicentre, double-blind, parallel-group, randomised study | UR | UR | UR | UR | LR | UR | HR |
Green et al. 2015 [13] | Randomised, double-blind, placebo-controlled study | LR | LR | LR | LR | LR | LR | HR |
Hartley et al. 2015 [37] | Randomised, parallel-group, multinational, non-inferiority clinical trial with an active controlled, double-blind treatment period | LR | LR | LR | UR | LR | LR | HR |
Kadowaki et al. 2014 [38] | Randomised, double-blind, placebo-controlled study | UR | UR | LR | UR | LR | UR | HR |
Matthews et al. 2010 [55] | Multicentre, randomised, double-blind, double-dummy, active-controlled study | UR | UR | LR | UR | LR | UR | HR |
Rosenstock et al. 2013 [59] | Multicentre, randomised, double-blind, active controlled study | UR | UR | LR | UR | LR | UR | HR |
Schernthaner et al. 2015 [39] | Multinational, randomised, double-blind, phase IIIb/IV study | LR | UR | UR | UR | HR | UR | HR |
Schweizer et al. 2009 [40] | Double-blind, randomised, multicentre, active-controlled, parallel-group study | UR | UR | UR | UR | LR | UR | HR |
Schweizer et al. 2013 [53] | Post-hoc sub-analysis of a multi-centre, randomised, double-blind, parallel-group | UR | UR | UR | UR | UR | UR | UR |
Scirica et al. 2013 [12] Scirica et al. 2014 [41] Leiter et al. 2015 [42] Mosenzon et al. 2015 [43] | Multicentre, randomised, double-blind, placebo-controlled trial | LR | LR | LR | LR | LR | LR | LR |
Strain et al. 2013 [52] | Multinational, double-blind, randomised, placebo-controlled | LR | LR | LR | LR | LR | LR | LR |
White et al. 2013 [44] | Multicentre, randomised, double-blind placebo-controlled trial | LR | UR | LR | UR | LR | LR | HR |