Table 3.

Cochrane Collaboration's ROBINS-I tool for assessing risk of bias in non-randomised studies of interventions (Sterne et al., 2016).

Study	D1	D2	D3	D4	D5	D6	D7	Overall
Bassichetto et al. (2008)
Blackman et al. (2015)
Feldman-Winter et al. (2010)
Folker et al. (2018)
Ingram et al. (2011)
Law et al. (2007)
Radoff et al. (2019)
Tender et al. (2014)
Zakarija-Grkovic et al. (2010)

Domains: D1: Bias due to confounding. D2: Bias due to selection of participants. 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 reported result.

Judgement: Serious, Low, Moderate, No Information.