title: Exercise barrier and task self-efficacy in breast cancer patients during treatment.
abstract: Understanding exercise self-efficacy in breast cancer patients during treatment is important for enhancing physical activity adherence. Therefore, the primary study purpose was to determine, among breast cancer patients during treatment, the psychometric properties of scales to measure exercise barrier and task self-efficacy. The study also aimed to determine the following: (1) level of self-efficacy, (2) associations between barrier and task self-efficacy, and (3) associations between self-efficacy and patient age, race, and treatment type. Eighty-six female breast cancer patients recruited from a medical oncologist's office completed the scales once, and 46 repeated the scales 2 weeks later. The majority were Caucasian (95%), with 26% receiving chemotherapy, 64% hormonal therapy alone, and 5% radiation/other. The mean age was 59+/-14 years. The Cronbach's alpha for the nine-item barrier self-efficacy scale was 0.96, with a test-retest correlation of 0.89 (p<0.001). The Cronbach's alpha for the four-item task self-efficacy scale was 0.89, with a test-retest correlation of 0.83 (p<0.001). The mean barrier self-efficacy was slightly to moderately confident, with the lowest confidence reported in the ability to exercise when nauseated. The mean task self-efficacy was slightly to moderately confident, with the lowest confidence reported in the ability to jog for 10 min without stopping. Although no significant associations were found between self-efficacy and participant's race or treatment type, lower task self-efficacy was associated with older age (r=-0.36, p=0.001). Both self-efficacy scales demonstrated good internal consistency and test-retest reliability. Self-efficacy may be a useful target for physical activity interventions among breast cancer patients during treatment.
authors: Department of Medicine, SIU School of Medicine, P.O. Box 19636, Springfield, IL 62794-9636, USA. lrogers@siumed.edu
authors: Laura Q
authors: LQ
authors: Rogers
authors: Kerry S
authors: KS
authors: Courneya
authors: Steve
authors: S
authors: Verhulst
authors: Steve
authors: S
authors: Markwell
authors: Victor
authors: V
authors: Lanzotti
authors: Prabodh
authors: P
authors: Shah
mesh_terms: D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001294:Attitude to Health; D001943:Breast Neoplasms / Q000503:physiopathology* / Q000523:psychology* / Q000628:therapy; D015444:Exercise; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008875:Middle Aged; D011594:Psychometrics; D015203:Reproducibility of Results; D012107:Research Design; D020377:Self Efficacy; D012647:Self-Assessment; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires; D013647:Task Performance and Analysis