Modified valsalva versus standard valsalva for cardioversion of supraventricular tachycardia: systematic review and meta-analysis

Table 1 Risk of bias assessment

Study	Randomization	Deviations from the intended intervention	Missing outcomes data	Measurement of the outcome	Selection of the reported results	Overall risk of bias
Appelboam et al. [2]	⊖	⊖	⊖	⊖	⊖	⊖
Chen et al. (2019)	⍰	⊖	⊖	⊖	⍰	⊕
Ceylan et al. [3]	⊕	⊖	⊖	⊖	⊖	⊕
Çorbacıoğlu (2017) [5]	⊖	⊖	⊖	⊖	⊖	⊖

ISSN: 2466-1171