Assessing the Psychometric and Language Equivalency of the Chinese Versions of the Index of Nausea, Vomiting and Retching, and the Prenatal Self‐evaluation Questionnaire

Abstract

This study was an initial psychometric test of the Chinese versions of the Index of Nausea, Vomiting and Retching (INVR), and the Prenatal Self-Evaluation Questionnaire (PSEQ) in pregnant Taiwanese women. Although there already is evidence that the English-language versions of the scales are reliable and valid, it is important to verify the proper psychometric characteristics of the Chinese versions. Forward and backward translation, and a multiphase instrumentation study describing internal consistency, test-retest reliability, and content validity of the translated versions were conducted. A convenience sample was recruited from prenatal clinics in the south of Taiwan. Three measurement instruments were used in this study: the demographic inventory (DI), the INVR, and the PSEQ. Thirty pregnant women participated in the study. Both the internal consistency and stability coefficients of the INVR and PSEQ were satisfactory. The indices of content validity (CVI) for the Chinese versions of these two instruments were both 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 Taiwanese pregnant women. Researchers could use this study as a model for future translation and application of psychometric instrumentation.

A Comparison of Different Severities of Nausea and Vomiting During Pregnancy Relative to Stress, Social Support, and Maternal Adaptation

“…The INVR scale has been assessed, and there is good evidence of its reliability and validity in oncology and perinatal research 10,25,26 . The internal consistency (Cronbach's α) of the Chinese INVR was .92 to .94 2,27 . The test‐retest reliability was .97 (n = 30) 27 .…”

Relationships Between Leptin, hCG, Cortisol, and Psychosocial Stress and Nausea and Vomiting Throughout Pregnancy

“…The Cronbach's a for internal consistency of the Chinese INVR was .90-.94 (Chou, Avant, Kuo, & Cheng, 2005;Kuo et al, 2007). The test-retest reliability was .97 (n ¼ 30; Chou, Avant, et al, 2005). In this study, the Cronbach's a of the Chinese INVR was .91.…”

“…There is good evidence of the reliability and validity of the English-language INVR in perinatal research (Zhou et al, 1999). The Cronbach's a for internal consistency of the Chinese INVR was .90-.94 (Chou, Avant, Kuo, & Cheng, 2005;Kuo et al, 2007). The test-retest reliability was .97 (n ¼ 30; Chou, Avant, et al, 2005).…”

A review of patient self-report tools for chemotherapy-induced nausea and vomiting

“…The scale defines vomiting as "actually throwing up", which excludes any assessment of retching. There seem to be inconsistencies in the literature about the number of items in the scale: the description covers 14 items [44], a summary comparison of NVR measures describes it as a 16-item instrument [54], and a paper further evaluating the psychometric properties of the MANE defines it as having 17 items [6]. In a subsequent paper the instrument also appears to have been adapted (MANE-FU), but no new psychometric assessments of this adapted scale are reported [45].…”

“…Further testing of the concurrent validity and the testretest reliability of the MANE has been undertaken by Carnrike et al [6] indicating that the MANE demonstrates a moderate degree of test-retest reliability, with the instrument appearing to be more reliable in the measurement of nausea than vomiting. Concurrent validity between the MANE and continuous self-reporting was also found to be moderate.…”