Cherry 1994.

Methods	Randomised
Participants	N = 60 Age: range not given but all over 50 years Gender: not specified Inclusion criteria: 50 years old or over, unaided speech recognition thresholds no greater than 70 dB HL in the aided ear, agreement to buy a HA and kept them at the end of the trial period, mix of new and previous HA users
Interventions	Standard HA fitting versus HA fitting plus scheduled telephone contact post‐fitting on 3 occasions
Outcomes	Medium‐term: 4 months ‐ USE hours/month, HHIE (HANDICAP) Long‐term: 12 months ‐ number of complaints
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "randomly assigned" Comment: no details of randomisation process
Allocation concealment (selection bias)	Unclear risk	Comment: no details of randomisation process
Blinding of participants and personnel (performance bias) All outcomes	High risk	Participants and personnel not blinded due to the nature of the intervention
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not blinded
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Comment: there was a dropout rate for the interview and questionnaire that was not completely addressed. Results were not analysed on an intention‐to‐treat basis but there was a similar dropout in both groups, although reasons are not clear so not sure whether they would be relevant
Selective reporting (reporting bias)	Unclear risk	No protocol available
Other bias	Low risk	The study appears to be free of other sources of bias