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Letters |2 July 2002

Quality of Care in Patients with Diabetes

Sheldon Greenfield, MD; Sherrie H. Kaplan, PhD, MPH; Richard Kahn, PhD

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Author, Article, and Disclosure Information
  • Tufts University School of Medicine; Boston, MA 02111 (Greenfield, Kaplan)
    American Diabetes Association; Alexandria, VA 22311 (Kahn)
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Mahadevia and associates underscore the importance of understanding the central point of our paper, that is, that variation between physicians (physician-level clustering) can limit the power of studies comparing any groups of physicians (for example, fee-for-service vs. managed care settings or high-quality vs. low-quality practice settings). All studies attempting such comparisons must be designed with not only sufficient numbers of patients per physician but also sufficient numbers of physicians per comparison group to ensure adequate power. The analytic methods we used were specifically chosen to investigate the separate effects of adjustment for patient characteristics and then physician clustering...
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Greenfield S, Kaplan SH, Kahn R. Quality of Care in Patients with Diabetes. Ann Intern Med. 2002;137:71–72. doi: 10.7326/0003-4819-137-1-200207020-00022

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Published: Ann Intern Med. 2002;137(1):71-72.

DOI: 10.7326/0003-4819-137-1-200207020-00022

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2002 American College of Physicians
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704

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