alexa The Effect of Physician and Hospital Market Structure on Medical Technology Diffusion.
Nursing & Health Care

Nursing & Health Care

Health Economics & Outcome Research: Open Access

Author(s): KaracaMandic P, Town RJ, Wilcock A

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Abstract OBJECTIVE: To examine the influence of physician and hospital market structures on medical technology diffusion, studying the diffusion of drug-eluting stents (DESs), which became available in April 2003. DATA SOURCES/STUDY SETTING: Medicare claims linked to physician demographic data from the American Medical Association and to hospital characteristics from the American Hospital Association Survey. STUDY DESIGN: Retrospective claims data analyses. DATA COLLECTION/EXTRACTION METHODS: All fee-for-service Medicare beneficiaries who received a percutaneous coronary intervention (PCI) with a cardiac stent in 2003 or 2004. Each PCI record was joined to characteristics on the patient, the procedure, the cardiologist, and the hospital where the PCI was delivered. We accounted for the endogeneity of physician and hospital market structure using exogenous variation in the distances between patient, physician, and hospital locations. We estimated multivariate linear probability models that related the use of a DES in the PCI on market structure while controlling for patient, physician, and hospital characteristics. PRINCIPAL FINDINGS: DESs diffused faster in markets where cardiology practices faced more competition. Conversely, we found no evidence that the structure of the hospital market mattered. CONCLUSIONS: Competitive pressure to maintain or expand PCI volume shares compelled cardiologists to adopt DESs more quickly. © Health Research and Educational Trust. This article was published in Health Serv Res and referenced in Health Economics & Outcome Research: Open Access

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