title: Translation and psychometric assessment of the Persian version of the Rhodes Index of Nausea, Vomiting and Retching (INVR) scale for the assessment of chemotherapy-induced nausea and vomiting.
abstract: No tools are available to assess or measure the experience of chemotherapy-induced nausea and vomiting (CINV) for Persian/Farsi speakers. The purpose of this study is to translate the Rhodes Index of Nausea, Vomiting and Retching (INVR) scale for use with Persian-speaking cancer patients. A sample of 94 cancer patients were recruited from a cancer research centre in Mashhad-Iran. A standard two phase process of scale translation and validation was conducted. In phase I, standard 'forward-backward' translation procedure was used to translate the original version of the INVR questionnaire into Persian. The translated questionnaire was reviewed and revised and a Persian version of the scale was produced. In the second phase, a multiphase instrumentation study describing the internal consistency and test-retest reliability of the translated version was conducted. The inter-item correlation measured by Cronbach's alpha was 0.88. Test/re-test reliability was measured by the weighted kappa and was between 0.63 and 0.79, indicating 'substantial agreement' and stability between the initial and subsequent administrations for each item. These results demonstrate that the Persian version of the INVR is acceptable for use among Iranian cancer patients. Researchers could use this study as a model for future translation and application of psychometric instrumentation.
authors.affiliation: School of Nursing, Midwifery and Social Work, University of Manchester, Manchester, UK.
authors.forename: S
authors.initials: S
authors.lastname: Moradian
authors.forename: S
authors.initials: S
authors.lastname: Shahidsales
authors.forename: M R
authors.initials: MR
authors.lastname: Ghavam Nasiri
authors.forename: M
authors.initials: M
authors.lastname: Pilling
authors.forename: A
authors.initials: A
authors.lastname: Molassiotis
authors.forename: C
authors.initials: C
authors.lastname: Walshe
mesh_terms: D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000009:adverse effects*; D003431:Cross-Cultural Comparison; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009325:Nausea / Q000139:chemically induced* / Q000175:diagnosis; D009369:Neoplasms / Q000188:drug therapy*; D009730:Nursing Assessment / Q000379:methods; D011594:Psychometrics / Q000295:instrumentation*; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D014177:Translations; D014839:Vomiting / Q000139:chemically induced* / Q000175:diagnosis; D055815:Young Adult
chemical_list: D000970:Antineoplastic Agents
keywords: Persian; forward-backward translation; nausea; psychometric testing; scale; vomiting