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Transcultural Adaptation and Psychometric Study of the "City University London Birth Trauma Scale" (BiTS) for the brazilian context

Grant number: 19/27043-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2021
Effective date (End): March 31, 2022
Field of knowledge:Health Sciences - Medicine - Psychiatry
Principal researcher:Flávia de Lima Osório
Grantee:Ana Carolina Rossini Darwin
Home Institution: Faculdade de Medicina de Ribeirão Preto (FMRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


The Posttraumatic Stress Disorder (PTSD) consists in a cluster of symptoms that occur in response to one or more traumatic events and it can take place in the postpartum, caused by traumatic situations related to the moment of the birth or even by traumas related to the health of the baby in the first days of its life. The associated impacts are multiple, and can cause feelings of anguish and intense helplessness to the mother, compromising the maternal-infant bonding, besides a diversity of comorbidities. Considering its severity, as well as the lack of Brazilian instruments to assess birth trauma and its impacts, this study aims to to make a transcultural adaptation of the "City University London Birth Trauma Scale" (BiTS) for the brazilian context and verify its psychometric indicators of validation and reliability. The transcultural adaptation will involve the steps of independent translation of the instrument, translation synthesis, retro-translation, pre-test with around 15 women of different sociodemographic characteristics and elaboration of the final version. The content validity analysis will consist of a qualitative and quantitative evaluation (using the content validity coefficient) and will be performed by a multidisciplinary committee of specialists. The internal consistency will be assessed by calculating the Cronbach's alfa; the discriminant validity will be assessed by the ROC curve and comparison of distinct groups; the concurrent validity will have as a reference the instrument "Posttraumatic Stress Disorder Checklist for DSM-5" (PCL-5) and will be assessed by a correlation test; the BiTS structure will be determined by exploratory/confirmatory factor analysis techniques; and the test/retest reliability (after 15 to 30 days) will be assessed by the intraclass correlation coefficient. The analysis will be done using the statistic program SPSS, setting for all of them a significance level of p d 0,05.