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. 2019 Jan 31:53:18.
doi: 10.11606/S1518-8787.2019053000621.

Validation of an anxiety scale for prenatal diagnostic procedures

[Article in English, Portuguese]
Lucas Kindermann  1 , Jefferson Traebert  1   2 , Rodrigo Dias Nunes  1   2
Affiliations

Validation of an anxiety scale for prenatal diagnostic procedures

[Article in English, Portuguese]
Lucas Kindermann et al. Rev Saude Publica. .

Abstract
in English, Portuguese

Objective: To perform a cross-cultural adaptation of the Prenatal Diagnostic Procedures Anxiety Scale questionnaire for application in the Brazilian cultural context.

Methods: The translation and back translation processes followed internationally accepted criteria. A committee of experts evaluated the semantic, idiomatic, experimental and conceptual equivalence, proposing a pre-final version that was applied in 10.0% of the final sample. Afterwards, the final version was approved for the psychometric analysis. At that stage, 55 pregnant women participated which responded to the proposed Brazilian version before taking an ultrasound examination at a public hospital in Santa Catarina, in the year of 2017. The Edinburgh Postnatal Depression Scale was used as an external reliability parameter. The internal consistency of the instrument was obtained by Cronbach's alpha. Validation was performed by exploratory factorial analysis with extraction of principal components by the Kaiser-Guttman method and Varimax rotation.

Results: The Cronbach's alpha value of the total instrument was 0.886, and only the percentage of variance from item 2 (0.183) was not significant. The Kaiser-Guttman criterion defined three factors responsible for explaining 78.5% of the variance, as well as the Scree plot. Extraction of the main components by the Varimax method presented values from 0.713 to 0.926, with only item 2 being allocated in the third component.

Conclusions: The Brazilian version is reliable and valid for use in the diagnosis of anxiety related to the performance of ultrasound procedures in prenatal care. Due to the lack of correlation with the rest of the construct, it is suggested that item 2 be removed from the final version.

OBJETIVO:: Proceder à adaptação transcultural do questionário Prenatal Diagnostic Procedures Anxiety Scale para aplicação no contexto cultural brasileiro.

MÉTODOS:: Os processos de tradução e retrotradução seguiram critérios aceitos internacionalmente. Um comitê de especialistas avaliou as equivalências semântica, idiomática, experimental e conceitual, propondo uma versão pré-final que foi aplicada em 10,0% da amostra final. Em seguida, foi aprovada a versão final para a análise psicométrica. Nessa etapa participaram 55 gestantes que responderam à versão brasileira proposta antes de realizarem um exame ultrassonográfico em um hospital público de Santa Catarina, no ano de 2017. A Edinburgh Postnatal Depression Scale foi utilizada como parâmetro de confiabilidade externa. A consistência interna do instrumento foi obtida pelo alfa de Cronbach. A validação foi realizada por análise fatorial exploratória com extração de componentes principais pelo método de Kaiser-Guttman e rotação Varimax.

RESULTADOS:: O alfa de Cronbach do instrumento total foi 0,886, e apenas o percentual de variância do item 2 (0,183) não foi significativo. O critério de Kaiser-Guttman definiu três fatores responsáveis por explicar 78,5% da variância, assim como o gráfico de Escarpa. A extração dos componentes principais pelo método Varimax apresentou valores de 0,713 a 0,926, sendo apenas o item 2 alocado no terceiro componente.

CONCLUSÕES:: A versão brasileira é confiável e válida para uso no diagnóstico de ansiedade relacionada à realização de procedimentos ultrassonográficos no pré-natal. Devido à falta de correlação com o restante do construto, sugere-se a retirada do item 2 da versão final.

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Conflict of interest statement

Conflict of Interest: The authors declare no conflict of interest.

Figures

Figure
Figure. Scree plot. Hospital Regional de São José, state of Santa Catarina, Brasil, 2017. (n = 55)
See this image and copyright information in PMC

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