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Patients with diabetes must make a series of daily decisions involving nutrition, physical activity, medication, blood glucose monitoring, and stress management. Patients must also interact effectively with the health care system, their family members, friends, and employers to obtain the support necessary to manage their diabetes (1). Thus, enhancing the perceived self-efficacy of patients to self-manage their diabetes is an important goal of diabetes care and education.Perceived self-efficacy has become an important and useful construct in psychology (2-4) because it is related to the willingness and the ability of people to engage in various behavioral challenges including preventive and disease management behaviors (5-15). Studies in diabetes have demonstrated the effect of perceived self-efficacy on the adherence behavior of adolescents (16,17), African-American women with diabetes (18), adults with complex insulin regimens (18,19), and adults with type 1 or type 2 diabetes (20-22). However, in these studies, self-efficacy has been defined primarily as the perceived ability to engage in various situation-specific self-management tasks such as blood glucose monitoring and ordering meals in a restaurant, or the studies have focused on the needs of particular group of patients (e.g., adolescents).In 1991, we conducted a randomized controlled trial to evaluate the effectiveness of a patient empowerment program for adults that focused entirely on psychosocial issues such as managing stress, obtaining family support, negotiating with health care professionals and employers, and dealing with uncomfortable emotions (23). Because we were unable to identify a measure of diabetes-related self-efficacy for adults that focused on these important psychosocial areas, we developed the Diabetes Empowerment Scale (DES), which is a 37-item Likert-type questionnaire (24), and we used it in that study. The study showed that the program resulted in both psychosocial and blood glucose level improvements.
RESEARCH DESIGN AND METHODS
Instrument developmentThe pilot version of the DES had 8 subscales that were keyed to the major content areas of the patient empowerment and education program (23,24). The structure of the DES and the patient empowerment program were based on our earlier work in patient empowerment (25)(26)(27). In an earlier study (25), we defined the purpose of the empowerment approach to diabetes education as helping patients make informed choices about their diabetes selfmanagement. In that study, we offered a 4-step behavior change model: 1) patient identification of problem areas, 2) exploration of the emotions associated with those problems, 3) development of a set of goals and strategies to overcome the barriers to achieving those goals, and 4) determining patients' motivation to make a commitment to the behavior change plan. That approach to facilitating behavior change in diabetic patients was adapted from earlier work in counseling psychology (28-31). Most of the patient empowerment program and DES subsc...