Translation and validation of MD Anderson Symptom Inventory-Thyroid Cancer module in Chinese thyroid cancer patients: a cross-sectional and methodological study

Aim: To translate and validate the Chinese version of the MDASI-THY among thyroid cancer patients. Background: The M.D. Anderson Symptom Inventory-Thyroid Cancer module (MDASI-THY) is one of well-validated instruments for thyroid-specific symptom assessment. To date, the instrument has not been used in China. Methods: After standard forward- and back-translation procedures, two instruments, the Chinese version of MDASI-THY and the European Organization for Research and Treatment of Cancer QLQ C30, were answered by 309 thyroid patients. The content, convergent discriminant validity and reliability of the MDASI-THY were evaluated. Results: The scale of content validity index (S-CVI) and the item of content validity index (I-CVI) of the instrument were over 0.80. There were significant relationships between MDASI-THY and EORTC QLQ-C30 (r range, 0.139 similar to 0.766, -0.759 similar to-0.461, p < 0.001). Symptoms were severer for patients underwent surgical treatment (Z =-9.999, p < 0.001). The Cronbach's alpha was 0.966 (between 0.954 and 0.827 for subscales). Most symptom items had moderate to high interitem correlations (r range, 0.297 similar to 0.773). Conclusions: The Chinese version of MDASI-THY demonstrated favorable validity and reliability. It can be used in development of symptom management program in thyroid cancer patients in China. Relevance to clinical practice: Healthcare providers can apply this instrument to assess Chinese thyroid cancer patients to increase the understanding of their symptom experience, resulting in a better symptom management.