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A study to translate and validate the Thai version of the Victoria Respiratory Congestion Scale
Tuangporn Tantiwatniyom1, Kittiphon Nagaviroj2
1Department of Family Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
Purpose:
Few clinical tools are available to objectively evaluate death rattles in palliative care. The Victoria Respiratory Congestion Scale (VRCS) was adapted from the Back's scale, which has been widely utilized in research and clinical practice. The VRCS will be translated into Thai and research will be conducted to determine its validity and reliability in assessing death rattles in palliative care.
Methods:
Two qualified language specialists converted the original tool into Thai and then back to English. Between September 2021 and January 2022, a cross-sectional study was undertaken at a palliative care unit at Ramathibodi Hospital to determine the Thai VRCS's validity and reliability. Two evaluators independently assessed the volume of secretion noises using the Thai VRCS. The criterion-related validity of VRCS was determined by calculating the correlation between the sound level obtained with a standard sound meter and the VRSC scores using Spearman's correlation coefficient method. To assess inter-rater reliability and agreement measurement on ratings, we utilized a two-way random-effects model with Cohen's weighted kappa agreement.
Results:
Forty patients enrolled in this study with a mean age of 75.3 years. Fifty-five percent had a cancer diagnosis. Spearman's rho correlation coefficient was found to be 0.8822, p < 0.05, indicating a highly significant link. The interrater reliability analysis revealed that the interrater agreement was 95% and the Cohen's weighted kappa agreement was 0.92, indicating near-perfect agreement.
Conclusions:
Thai VRCS demonstrated excellent criteria-related validity and interrater reliability. Using the Thai VRCS to assess adult palliative care patients' death rattles was recommended.
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