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Creation and validation of the Singing Voice Handicap Index
Seth M Cohen1, Barbara H Jacobson, C Gaelyn Garrett
1Division of Otolaryngology-Head and Neck Surgery, Duke Voice Care Center, Duke University Medical Center, Box 3805, Durham, NC 27710, USA.
Objectives:
We developed and validated a disorder-specific health status instrument (Singing Voice Handicap Index; SVHI) for use in patients with singing problems.
Methods:
Prospective instrument validation was performed. Of 81 original items, those with poor statistical validity were eliminated, resulting in 36 items. The ability to discriminate dysphonic from normal singers, test-retest reliability, internal consistency, and construct validity were assessed.
Results:
We included 112 dysphonic and 129 normal singers, professional and nonprofessional, of classical, country, rock, choral, and gospel repertoire. Dysphonic singers had worse SVHI scores than normal singers (p < or = .001, rank sum test). Test-retest reliability was high (Spearman correlation, 0.92; p < or = .001). Internal consistency demonstrated a Cronbach's alpha of .97, and the correlation between the SVHI and self-rated singing voice impairment was .63 (p < or = .001, Spearman correlation).
Conclusions:
The SVHI is a reliable and valid tool for assessing self-perceived handicap associated with singing problems.
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