The role of hospital volume in coronary artery bypass grafting: is more always better?1
Brahmajee K. Nallamothu, MD, MPHa,2,
Sanjay Saint, MD, MPHa,b,
Scott D. Ramsey, MD, PhDc,
Timothy P. Hofer, MD, MSca,b,
Sandeep Vijan, MD, MSca,b and
Kim A. Eagle, MD, FACCa,*
a Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, USA
b Health Services Research and Development Field Program, Veterans Administration Medical Center, Ann Arbor, Michigan, USA
c Department of Medicine, University of Washington School of Medicine, Seattle, Washington, USA
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Figure 1 Number of coronary artery bypass grafting surgeries in the 56 hospitals in the Solucient EXPLORE database.
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Figure 2 Predicted and observed in-hospital mortality rates for coronary artery bypass grafting at low- and high-volume hospitals by risk group. P values are for the comparison of observed in-hospital mortality rates between low- (LVH) and high-volume hospitals (HVH). P* = p values <0.05.
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