Abstract
BackgroundValid and reliable instruments are needed to assess such beliefs, attitudes, and knowledge. This study aimed to translate Breast Cancer Screening Beliefs Questionnaire into Persian and evaluate its psychometric properties among Iranian women.MethodsIn this methodological study, the twelve-item Breast Cancer Screening Beliefs Questionnaire was translated into Persian and filled out by 1256 Iranian women. Face, content, convergent, and discriminant validity were evaluated and exploratory and confirmatory factor analyses were performed for construct validity evaluation. Reliability was also evaluated through calculating Cronbach’s alpha, McDonald’s omega, Average inter-item correlation, and test-retest intraclass correlation coefficient and finally, composite reliability was estimated.ResultsThree factors were extracted in factor analysis which included screening attitude, screening knowledge and perception, and screening practice. These factors explained 55.71% of the total variance of breast cancer screening beliefs. This three-factor model was confirmed in confirmatory factor analysis based on model fit indices (PCFI = 0.703, PNFI = 0.697, CMIN/DF = 2.127, RMSEA = 0.30, GFI = 0.980, AGFI = 0.998, and CFI = 0.991). Convergent and discriminant validity were also confirmed. Composite reliability and test-retest intraclass correlation coefficient were more than 0.7.ConclusionWith a three-factor structure, the Persian Breast Cancer Screening Beliefs Questionnaire has acceptable validity and reliability and hence, can be used to evaluate Iranian women’s breast cancer screening beliefs.
Highlights
Valid and reliable instruments are needed to assess such beliefs, attitudes, and knowledge
In total, 1300 women were recruited to fill out Breast Cancer Screening Beliefs Questionnaire (BCSBQ), 1256 of them completely filled out and returned their questionnaires
Our findings denotes the appropriateness of the questionnaire for assessing Breast cancer (BC) screening beliefs among Iranian women because an explained variance of more than 50% is indicative of the appropriateness of the extracted factors [35]
Summary
Valid and reliable instruments are needed to assess such beliefs, attitudes, and knowledge. This study aimed to translate Breast Cancer Screening Beliefs Questionnaire into Persian and evaluate its psychometric properties among Iranian women. Breast cancer (BC) is the most prevalent malignancy [1, 2] and the second leading cause of death after lung cancer [3] among women worldwide. It is among the most costly cancers in the world with the annual financial burden of 88 billion dollars. Delay in cancer diagnosis is a major factor behind its high mortality rate because survival is directly associated with the stage of cancer at diagnosis [7]. Two third of Iranian women with BC experience early death due to the delays in the diagnosis of BC [9]
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