Limitations
The main limitations of this study, besides sample size and blinding type, are the limited sensitivity of the methods we used for assessing patients pre and post-intervention and the short period of use of hearing aids use. Given the dearth of studies on this topic, the assessment methods chosen in this study are not deemed a gold standard for cognitive assessment, despite the adoption of intra-subject analyses (comparing the individual against themselves after the intervention over the time). The period of use of hearing aids up to the reassessment was very short, precluding the detection of the intervention effects by the assessments we performed in this study. It is worth to mention this is a pragmatic pilot clinical trial. It may encourage researches worldwide to conduct other studies that help audiologists and ENTs to better understand how the hearing aids affect their patients in both short and long-term.