Open Access, Peer-reviewed
eISSN 2093-758X
    J Korean Acad Nurs. 2012 Jun;42(3):385-395. Korean.
    Published online Jun 29, 2012.
    https://doi.org/10.4040/jkan.2012.42.3.385
    © 2012 Korean Society of Nursing Science
    Original Article

    Development and Validation of Self-Efficacy Scale for Self-Management of Breast Cancer (SESSM-B)

    Ran Lee,1 Soo Hyun Kim,2 Keun Sook Lee,3 and Myung Kyung Seo4
      • 1Head Nurse, Endoscopy Center, National Cancer Center, Goyang, Korea.
      • 2Assistant Professor, Department of Nursing, Inha University, Incheon, Korea.
      • 3Head Nurse, Center for Breast Cancer, National Cancer Center, Goyang, Korea.
      • 4Nurse, Center for Breast Cancer, National Cancer Center, Goyang, Korea.
    • Address reprint requests to: Lee, Ran. Endoscopy Center, National Cancer Center, 323 Jungbalsan-ro, Ilsandong-gu, Gyeonggi-do 410-769, Korea. Tel: +82-31-920-1285, Fax: +82-31-920-1289, Email: iran@ncc.re.kr
    Received June 21, 2011; Accepted May 28, 2012.

    Abstract

    Purpose

    This purpose of this study was to develop and validate a Self-Efficacy Scale for Self-Management of Breast Cancer (SESSM-B).

    Methods

    The SESSM-B was developed and validated as follows: Item generation, pilot study, and tests of validity and reliability. Twenty-one items were developed through evaluation by 10 experts and 13 items were finally confirmed through item analysis and factor analysis. Psychometric testing was performed with a convenience sample of 303 women with breast cancer. Data were analyzed using factor analysis, Pearson correlation coefficients, and Cronbach's alpha.

    Results

    Five factors evolved from the factor analysis, which explained 69.8% of the total variance. The first factor 'coping with psycho-informational demand' explained 17.2%, 2nd factor 'maintenance of healthy lifestyle' 14.5%. 3rd factor 'management of side-effects' 13.3%, 4th factor 'therapeutic compliance' 12.8%, and 5th factor 'sexual life' 11.9%. SESSM-B also demonstrated a concurrent validity with health-related quality of life scale, EORTC QLQ-C30 & BR23. The internal consistency, Cronbach's alpha, was .78, and reliability of the subscales ranged from .61 to .79.

    Conclusion

    The results of this study suggest that the SESSM-B is an easy, reliable, and valid instrument to measure self-efficacy for self-management of breast cancer.

    Keywords
    Breast cancer; Self-efficacy; Validation studies

    Tables

    Table 1
    Socio-demographic and Clinical Characteristics of the Participants (N=303)

    Table 2
    Item Analyses

    Table 3
    Results of Factor Analyses

    Table 4
    Multitrait/Multi-item Matrix (Correlation Matrix Corrected for Overlap) for Item Convergent and Item Discriminant

    Table 5
    Correlations between the SESSM-B and the EORTC QLQ-C30 and BR23

    Table 6
    Change of Internal Consistency

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    MeSH Terms
    Self Care*
    Self Efficacy*
    Adaptation, Psychological
    Adult
    Breast Neoplasms/psychology*
    Factor Analysis, Statistical
    Female
    Health Status
    Humans
    Middle Aged
    Pilot Projects
    Program Development
    Psychometrics
    Quality of Life
    Questionnaires
    Metrics
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