How Electronic Cigarette Affects the Vascular System

Table 2

Risk of bias assessment of 3 randomized controlled trial studies using RoB 2.

Criteria	George et al. [11]	Ikonomidis et al. [12]	Ikonomidis et al. [4]
Bias arising from the randomization process	Some concerns	Some concerns	High risk
Bias due to deviations from intended interventions	Some concerns	Some concerns	Low risk
Bias due to missing outcome data	Low risk	Low risk	Low risk
Bias in measurement of the outcome	Low risk	Low risk	Low risk
Bias in selection of the reported result	Low risk	Some concerns	Some concerns
Overall risk of bias	Some concerns	Some concerns	High risk