Henry 2006.

Methods	Randomised controlled trial
Participants	n = 123 Military veterans Screened initially with the Tinnitus‐Impact Screening Interview
Interventions	Group 1: Tinnitus Retraining Therapy (TRT) Group 2: tinnitus masking (TM) TRT versus TM
Outcomes	Tinnitus Handicap Inventory (THI) Tinnitus Handicap Questionnaire (THQ) Tinnitus Severity Index (TSI) Verbally administered TRT interview forms
Notes	Significant improvement for both groups Group 1: greater improvement in outcome measures in the TRT group as compared with the TM group
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	High risk	The sequence was a non‐specified form of random allocation for the first patient, followed by alternation
Allocation concealment?	High risk	The first qualifying patient was placed into a treatment group by random selection; each subsequent patient was placed by alternating between groups
Blinding? All outcomes	High risk	This study was not blinded
Incomplete outcome data addressed? All outcomes	Low risk	Incomplete outcome data were addressed appropriately
Free of selective reporting?	Low risk	All data were presented in full in an appropriate manner
Free of other bias?	Low risk	No other sources of potential bias were identified