Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Overall symptoms of tinnitus
RCT	58 people	Proportion of people who had improved tinnitus (assessed using a subjective response assessed by 4-point questionnaire — tinnitus worse, same, improved, or abolished) 1 week 14/31 (45%) with electromagnetic stimulation (15 minutes/day) 2/23 (9%) with placebo device	P = 0.0013 The RCT reported that 4/58 (7%) people withdrew from the trial, and that the analysis was not by intention to treat	Effect size not calculated	electromagnetic stimulation
RCT Crossover design	20 people	Proportion of people who had improved tinnitus (tinnitus severity measured on a scale of 0–7) 2/20 (10%) with electrical suppression 3/20 (15%) with placebo device	Significance not assessed