142 CHAPTER 7 7.6.2.3 Appendix 2: Figure S2 Figure S2. Risk of bias (non-randomised studies). D1 D2 D3 D4 D5 D6 D7 Overall D1: D2: D3: D4: D5: D6: D7: Overall: 0% 100% D1: bias due to confounding Critical High risk Some Low risk D2: bias due to selection of participants risk of bias concerns of bias D3: bias in classification of interventions D4: bias due to deviations from intended interventions D5: bias due to missing data D6: bias in measurement of outcomes D7: bias in selection of the reported result 25% 50% 75% + + + + - + + + + + - x x + + x + x - - + + + + + + x x - - x - x - Song 2017 Nicolo 2015 Arabi 2018 Bendavid 2019 Jeong 2019 Koekkoek 2019 x - x x - - x + + x - x - -
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