Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
CVD
Systematic review	1306 people 14 RCTs in this analysis	Proportion of people with new-onset atrial fibrillation 1/660 (0.2%) with antithyroid drugs plus radioiodine 3/646 (0.5%) with radioiodine alone	Significance not assessed