Validation and Development of the Korean Version of Screening Index for Voice Disorder (SIVD-K).

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.