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Factor analytic structure of auditory impairment in elderly persons
1Division of Audiology and Speech Pathology, Baylor College of Medicine, Houston, Texas, USA.
Journal of the American Academy of Audiology
|August 1, 1997
Summary
Principal components analysis of elderly hearing impairment reveals distinct factors in auditory processing. Hearing sensitivity loss, speech understanding, and perceived handicap are key elements in understanding age-related hearing difficulties.
Area of Science:
- Audiology
- Gerontology
- Psychophysics
Background:
- Presbyacusis, age-related hearing impairment, significantly impacts elderly individuals' quality of life.
- Understanding the complex factors underlying auditory processing is crucial for effective intervention.
- Previous research often focused on hearing sensitivity loss, but the interplay with other auditory functions and perceived handicap requires further investigation.
Purpose of the Study:
- To investigate the underlying factor structure of auditory processing in elderly individuals with presbyacusis.
- To analyze the relationship between objective audiometric measures and subjective self-assessed handicap.
Main Methods:
- Principal components analysis was applied to audiometric data and self-assessed handicap scores from 180 elderly individuals.
- Audiometric measures included pure-tone threshold sensitivity, speech understanding in quiet and noise, and dichotic listening.
- The Hearing Handicap Inventory for the Elderly (HHIE) was used for self-assessed handicap evaluation.
Main Results:
- Six distinct factors emerged: low-frequency sensitivity loss, high-frequency sensitivity loss, general speech understanding ability, self-assessed handicap, central processing of left ear input, and central processing of right ear input.
- Hearing sensitivity loss, impacting speech audibility, remains a primary factor in speech understanding challenges.
- General speech understanding ability and central auditory processing for each ear were identified as separate factors.
Conclusions:
- Degree of hearing sensitivity loss is a critical determinant of speech audibility and understanding in the elderly.
- Low-frequency and high-frequency hearing loss represent distinct underlying factors.
- Perceived auditory handicap is a separate construct, not strongly correlated with audibility, general speech understanding, or central processing abilities.