Farsi Version of the Mammography Self-efficacy Scale for Iranian Women

Adaptation and validation of the Arabic version of self-efficacy scale for mammography. A report on psychometric properties

Objectives:

To culturally adapt and validate a mammography-specific self-efficacy (MSSE) scale into Arabic for the Saudi Arabian context.

Methods:

A methodological study aimed at tool translation and adaptation conducted in primary healthcare centers in As Madinah, Saudi Arabia between March 2016 and May 2016. The MSSE scale was translated and adapted into Arabic using standard procedures. Content and face validity were investigated. Confirmatory factor analysis and reliability analysis were used to determine the scale’s psychometric properties.

Results:

The scale showed a good internal consistency (Cronbach’s alpha=0.88). The confirmatory factor analysis supported the scale’s single-factor structure and the goodness-of-fit indices confirmed the model’s good fit (comparative fit index=0.961, Tucker-Lewis index=0.943, root-mean-square error of approximation=0.076, and standardized root-mean-square residual=0.045). Women who had a mammogram in the last 2 years scored significantly higher on the scale (39±6.2) than women who had never received a mammogram (35.88±7.2; p=0.009).

Conclusion:

The study confirmed that the scale’s Arabic version has good psychometric properties, using reliability analysis, confirmatory factor analysis, and extreme groups validation. The scale is likely to be useful for evaluating interventional studies aimed at improving mammography screening participation rates.

Psychometric properties of the mammography self-efficacy and fear of breast cancer scales in Iranian women

Background

Research investigating mammography screening has often reported low mammography self-efficacy and breast cancer fear contribute to underutilization of mammography. This study aimed to examine the reliability and validity of Champion’s Mammography Self-efficacy Scale (CMSS) and Champion’s Breast Cancer Fear Scale (CBCFS) in a sample of Iranian women.

Methods

The adapted instruments were administered to a community sample of 482 women aged 40 years or older. They inhibited in Sanandaj, Iran. Cronbach’s α coefficients, item-total, and test-retest correlations were used to assess the reliability of the scales. Confirmatory factor analysis was applied to assess construct validity.

Results

The α coefficients for the Farsi 14-item CMSS and 8-item BCFS were .87 and.95, respectively. In terms of the CMSS confirmatory factor analysis, the proportion of x²/df was 2.4, Comparative Fit Index (CFI) = 0.93, Tucker Lewis Index (TLI) = 0.96 providing a strong fit to the data induced by two-factor model. With regard to CBCFS, x²/df was 86.33, CFI =0.99, and TLI =0.99 supporting one-factor model.

Conclusion

The CMSS and CBCFS exhibited strong initial psychometric properties; therefore, they are recommended to understand women’s breast cancer screening behaviors better.