title: [Development and validation of self-efficacy scale for self-management of breast cancer (SESSM-B)].
abstract: OBJECTIVE
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Endoscopy Center, National Cancer Center, Goyang, Korea. iran@ncc.re.kr
authors.forename: Ran
authors.initials: R
authors.lastname: Lee
authors.forename: Soo Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Keun Sook
authors.initials: KS
authors.lastname: Lee
authors.forename: Myung Kyung
authors.initials: MK
authors.lastname: Seo
mesh_terms: D000223:Adaptation, Psychological; D000328:Adult; D001943:Breast Neoplasms / Q000523:psychology*; D005163:Factor Analysis, Statistical; D005260:Female; D006304:Health Status; D006801:Humans; D008875:Middle Aged; D010865:Pilot Projects; D016730:Program Development; D011594:Psychometrics; D011788:Quality of Life; D012648:Self Care; D020377:Self Efficacy; D011795:Surveys and Questionnaires