It would be useful to better understand the personal determinants of successful interventions in the community, especially those interventions already recognized for their efficacy and efficiency, such as elder home care telesurveillance. This is a modality of health care services that transmits, via a call center on a 24/7 basis, the clinical information necessary to follow elders outside medical centers. Community health workers refer elders to this service. A qualitative research design was realized to understand why so much difference in the implementation of this service had arisen in two comparable sites previously judged receptive. The research objectives were as follows: (1) to document the personal determinants associated with telesurveillance adoption by community health workers, in two sites previously judged receptive; and (2) to point out the personal determinants that can explain successful adoption of telesurveillance. According to the Theory of Interpersonal Behavior, the results showed that habits (e.g., community health workers' knowledge of new information technologies) and perceived barriers in clinical practice were fundamental determinants in the adoption of telesurveillance.

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