Predictability and reliability of hearing aid benefit measured using the PHAB

Area of Science:

• Audiology
• Hearing Science
• Rehabilitation Engineering

Background:

• Hearing loss adaptation influences hearing aid benefit.
• Unaided communication difficulties are a key factor in perceived hearing aid success.
• The Profile of Hearing Aid Benefit (PHAB) measures self-assessed hearing aid benefit.

Purpose of the Study:

• To determine if hearing loss adaptation and unaided communication difficulties predict hearing aid benefit using the PHAB.
• To assess the test-retest reliability of the PHAB.
• To evaluate the PHAB's suitability for individual versus group research.

Main Methods:

• 58 experienced hearing aid users completed the PHAB and Communication Profile for the Hearing Impaired (CPHI).
• CPHI scales were used to measure adaptation to hearing loss and unaided difficulties.
• PHAB subscale scores were analyzed for prediction from CPHI scores.
• Test-retest reliability of PHAB was assessed in 28 subjects.

Main Results:

• Hearing aid benefit (all PHAB subscales) significantly correlated with the magnitude of unaided difficulties.
• One composite CPHI score predicted benefit for two PHAB sound perception subscales.
• PHAB reliability was modest and consistent with prior research.
• Critical differences for PHAB scores were large, potentially limiting individual application.

Conclusions:

• Unaided communication difficulties are significant predictors of self-assessed hearing aid benefit.
• The PHAB demonstrates potential for group research but may lack sensitivity for individual hearing aid users.
• Further research may be needed to refine or supplement the PHAB for individual clinical use.