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Korean Voice Catastrophization Index (K-VCI): Validation of the Voice Catastrophization Index for Koreans
Yeon Woo Lee1, Geun Hyo Kim1, In Ho Bae2
1Department of Otorhinolaryngology - Head and Neck Surgery, Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea.
Objective:
The purpose of present study was to validate a Korean version of the Voice Catastrophization Index for assessing catastrophization in patients with voice problems in a Korean population.
Methods:
Case group patients with voice problems (n = 80) and control group patients without voice problems (n = 25) participated in the study. They were asked to complete three questionnaires: Korean Voice Handicap Index, Korean Voice-Related Quality of Life, and Korean Voice Catastrophization Index (K-VCI). Some of case group with voice problems completed the same three questionnaires again to assess test-retest reliability. Clinicians implemented the Consensus Auditory-Perceptual Evaluation of Voice evaluation to rate the overall severity on voice quality.
Results:
K-VCI scores for case group were significantly higher than those for control group. K-VCI scores were significantly correlated with Korean Voice Handicap Index, Korean Voice-Related Quality of Life, and overall severity. The K-VCI had significant test-retest reliability and its internal consistency was good to excellent (range of Cronbach alpha correlation coefficients: 0.789-0.930). The K-VCI was not affected by patient sex, age, symptom duration, or diagnosis types. K-VCI scores were highest among patients with primary muscle tension dysphonia.
Conclusion:
We validated the K-VCI questionnaire for use in measuring the degree of catastrophization of voice problems in a Korean population. Future studies with a larger sample size will be necessary to further verify this and determine the clinical usefulness of the K-VCI.
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