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This article describes the development of a 38-item self-report Adherence Determinants Questionnaire (ADQ) to assess 7 elements of patients' adherence to medical treatment and prevention: (a) perceptions of interpersonal care, (b) beliefs about susceptibility to disease, (c) beliefs about severity of disease, (d) assessments of perceived utility of adhering (efficacy and benefits vs. costs of adhering), (e) perceptions of subjective social norms for adhering, (f) intentions to adhere, and (g) perceptions of supports available for and absence of barriers to adherence. Past adherence and health value were also assessed
DiMatteo et al. (Mon,) studied this question.