Objectives: This systematic review aims to examine the audiological and non-audiological factors that influence hearing aid use, benefit and satisfaction in adults based on studies published during the last decade (2011 and 2022).

Design: Following the PRISMA 2020 guidelines, articles were identified through systematic searches on five platforms which included Web of Science, Scopus, PubMed, EBSCO host including CINAHL and Academic Search Complete. The National Institute of Health (NIH) Quality assessment tool and the Oxford Centre for Evidence Based Medicine (CEBM) tool were used for quality assessment and grading of level of evidence.

Results: Thirty-four articles met the inclusion criteria and were included in the review. A total of 95 significant factors influencing hearing aid use (n=45), benefit (n=13) and satisfaction (n=33) were identified. Clear determinants of hearing aid use, benefit and satisfaction were hearing sensitivity, self-reported hearing difficulty, speech perception, cognition, attitude and beliefs. Non-significant determinants were slope of audiogram, occupation, and marital status. Conflicted determinants were type of hearing aid fitting, age, gender and income. 30 cross-sectional studies included in this review were graded level 4, 1 cohort studied rated graded level 3 and 2 randomized control trials rated level 2.

Conclusions: The review identified some new factors of hearing aid outcomes such as speech perception ability, bothersome tinnitus, neurological disorders that contributes to mental health, prevalence of hearing aid problems, narratives on hearing aid fitting procedures, service delivery model and social networks that were not evident in the previous reviews. These factors need further investigation through high quality studies to further strengthen the existing evidence.