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Validation and Development of the Korean Version of Screening Index for Voice Disorder (SIVD-K)
Geun Hyo Kim1, Dong Won Lim1, Yeon Woo Lee2
1Department of Otorhinolaryngology-Head and Neck Surgery and Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea.
Objective:
This study aimed to translate, culturally adapt, and validate the Korean version of the screening index for voice disorder (SIVD-K).
Methods:
Case group patients with voice problems (n = 90) and control group patients without voice problems (n = 25) participated in the study. They completed three questionnaires (the Korean version of the voice handicap index [VHI-K], the Korean version of Voice-Related Quality of Life [VRQOL-K], and the SIVD-K). Case group patients re-completed the SIVD-K to assess test-retest reliability. Finally, receiver operating characteristic analysis was performed to determine the cut-off value of SIVD-K for differentiating the case and control groups.
Results:
The SIVD-K scores for the case group were significantly higher than those for the control group. The scores of SIVD-K showed significant correlations with the VHI-K and VRQOL-K. Test-retest reliability was high (Spearman's rho = 0.854), and internal consistency was acceptable. The cut-off value for differentiating case and control groups was 2.5, with scores of 3 or higher suggesting a risk for dysphonia.
Conclusion:
The SIVD-K demonstrated good reliability and validity as a brief screening tool for dysphonia in Korea. While it shows promise for early detection in clinical practice, these findings should be considered preliminary because the study was conducted at a single site and the participant groups were uneven in size. Larger multicenter studies are needed to confirm its clinical applicability.
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