1. Association of hospital coronary artery bypass volume with processes of care, mortality, morbidity, and the Society of Thoracic Surgeons composite quality score 
David M. Shahian, MD, Sean M. O'Brien, PhD, Sharon-Lise T. Normand, PhD, Eric D. Peterson, MD, MPH, Fred H. Edwards, MD 
The Journal of Thoracic and Cardiovascular Surgery 
Volume 139, Issue 2, Pages (February 2010)
DOI: /j.jtcvs
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

2. Figure 1
Unadjusted rates for mortality (A), major morbidity (B), failure to use the internal thoracic artery (IMA) (C), and failure to use NQF-endorsed medications (D), plotting volume as a continuous variable. Each symbol indicates one of the 733 study hospitals. Volumes were determined by using all hospital procedures that included a coronary artery bypass grafting (CABG) procedure, whereas the performance rates were calculated with only isolated CABG procedures.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

3. Figure 2
Adjusted odds ratio plots (using restricted cubic spline models with reference = 500 CABG procedures) of mortality (A), major morbidity (B), failure to use the internal thoracic artery (IMA) (C), and failure to use NQF-endorsed medications (D), plotting volume as a continuous variable. Each symbol represents one of the 733 study hospitals plotted. Volumes were determined using all hospital procedures that included a coronary artery bypass grafting (CABG) procedure, whereas the performance rates were calculated with only isolated CABG procedures. See text for interpretation.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

4. Figure 3
Average Society of Thoracic Surgeons (STS) composite score (95% confidence interval [CI]) by volume category. CABG, Coronary artery bypass grafting.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

5. Figure 4
Society of Thoracic Surgeons (STS) coronary artery bypass grafting (CABG) composite score for all 733 study hospitals plotted against total hospital CABG volume analyzed as a continuous variable. Dotted line, STS average.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

6. Figure 5
Society of Thoracic Surgeons (STS) star rating by hospital total coronary artery bypass grafting (CABG) volume category. Solid line, 2 stars; large dashed line, 3 stars; small dashed line, 1 star.
The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs )
Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions