Development of a self-efficacy scale for mammography

Res Nurs Health. 2005 Aug;28(4):329-36. doi: 10.1002/nur.20088.


Mammography screening has been demonstrated to decrease mortality from breast cancer. Although adherence rates have increased, there is still a need to increase annual screening. Self-efficacy is a construct that has been found useful in predicting behaviors. Measurement of self-efficacy needs to be specific to the behavior and to have good validity and reliability. The purpose of this study is to describe development of a self-efficacy instrument to measure confidence in obtaining a mammogram. Bandura's model guided item development. Construct validity was measured using confirmatory factor analysis and logistic regression. Cronbach alpha was used to test internal consistency reliability. A Cronbach alpha coefficient of .87 was obtained. The mammography self-efficacy scale evidenced content and construct validity.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, P.H.S.
  • Validation Study

MeSH terms

  • Aged
  • Breast Neoplasms / diagnostic imaging
  • Breast Neoplasms / nursing
  • Breast Neoplasms / prevention & control*
  • Female
  • Humans
  • Mammography / psychology
  • Mammography / statistics & numerical data*
  • Middle Aged
  • Missouri
  • Patient Acceptance of Health Care / psychology*
  • Psychometrics
  • Reproducibility of Results
  • Self Efficacy*
  • Surveys and Questionnaires / standards*