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

• Published in: Cancer nursing Vol. 38; no. 6; p. 484
• Main Authors: Hashemian, Masoumeh, Hidarnia, Alireza, Aminshokravi, Farkhondeh, Lamyian, Minoor, Hassanpour, Kazem, Akaberi, Arash, Tavafian, Sedigheh Sadat
• Format: Journal Article
• Language: English
• Published: United States 01.11.2015
• Subjects: Adult; Aged; Cross-Sectional Studies; Female; Humans; Iran; Mammography - psychology; Middle Aged; Reproducibility of Results; Self Efficacy; Surveys and Questionnaires; Translating
• ISSN: 1538-9804
• DOI: 10.1097/NCC.0000000000000238

Self-efficacy is a crucial factor in adopting mammography behavior. A reliable and valid instrument is necessary to measure self-efficacy among Iranian women. The aim of this study is to translate the original version of Champion's Mammography Self-efficacy Scale into Farsi and then to estimate the Farsi version's reliability and validity. In a cross-sectional study, 200 women 40 years or older who were referred to health centers in Iran were invited to complete the related questionnaires during an interview. Cronbach's α coefficients and item-total correlations were measured to evaluate the reliability of the scales. Content and face validities were evaluated using the opinions of a panel of experts, and construct validity was estimated through applying confirmatory factor analysis. Logistic regression and χ tests were used to estimate theoretical relationships. In terms of reliability, the internal consistency α was .904 and the test-retest reliability correlation over a 4-week period was 0.624. With regard to the confirmatory factor analysis, the proportion of χ to degrees of freedom was 0.394, giving a P value of .852 and a root-mean-square error of approximation less than 0.001 with confidence intervals of less than 0.001 and 0.018, with a comparative fit index of 1, normed fit index of 0.999, relative fit index of 0.993, and incremental fit index of 1. The items that form the self-efficacy measurement scale in the Farsi version are highly reliable and valid. Healthcare professionals and nursing health communities may apply the instrument to determine women's self-efficacy and to plan appropriate educational interventions, aiming at promoting women's mammography behavior.