Table 2.

Results of risk of bias assessments for each included study generated using the Robvis tool.

Study	D1	D2	D3	D4	D5	D6	D7	Overall
Malan-Muller et al. (2022)	HR	LR	SC	SC	LR	LR	LR	HR
Hemmings et al. (2017)	HR	LR	SC	SC	LR	SC	LR	HR
Bajaj et al. (2019)	HR	LR	SC	SC	LR	LR	LR	HR

D1: Domain 1 – Risk of bias due to confounding. D2: Domain 2 – Risk of bias arising from measurement of the exposure. D3: Domain 3 – Risk of bias in selection of participants into the study (or into the analysis). D4: Domain 4 – Risk of bias due to post-exposure interventions. D5: Domain 5 – Risk of bias due to missing data. D6: Domain 6 – Risk of bias arising from measurement of the outcome. D7: Domain 7 – Risk of bias in selection of the reported result. LR – low risk of bias. SC – some concerns. HR – high risk of bias. VHR – very high risk of bias.