Assessing the psychometric and language equivalency of the Chinese versions of the index of nausea, vomiting, and retching and the prenatal self-evaluation questionnaire

Nausea, Vomiting, and Retching (INVR) and the Prenatal Self-Evaluation Questionnaire(PSEQ) in pregnant Taiwanese women. Although there already is evidence that theEnglish-language versions of the scales are reliable and valid, it is important to verify theproper psychometric characteristics of the Chinese versions. Forward and backwardtranslation, and a multiphase instrumentation study describing internal consistency, testretestreliability, and content validity of the translated versions were conducted. Aconvenience sample was recruited from prenatal clinics in the south of Taiwan. Threemeasurement instruments were used in this study: the demographic inventory (DI), theINVR, and the PSEQ. Thirty pregnant women participated in the study. Both the internalconsistency and stability coefficients of the INVR and PSEQ were satisfactory. Theindices of content validity (CVI) for the Chinese versions of these two instruments wereboth 1.0, indicating that they are acceptable for use among Taiwanese pregnant women.This was the first instrumentation study of the INVR and PSEQ applied to Taiwanesepregnant women. Researchers could use this study as a model for future translation andapplication of psychometric instrumentation.