1. Multivariable prediction of in-hospital mortality associated with aortic and mitral valve surgery in Northern New England 
Edward R Nowicki, MD, Nancy J.O Birkmeyer, PhD, Ronald W Weintraub, MD, Bruce J Leavitt, MD, John H Sanders, MD, Lawrence J Dacey, MD, Robert A Clough, MD, Reed D Quinn, MD, David C Charlesworth, MD, Donato A Sisto, MD, Paul N Uhlig, MD, Elaine M Olmstead, BA, Gerald T O'Connor, PhD, DSc 
The Annals of Thoracic Surgery 
Volume 77, Issue 6, Pages (June 2004)
DOI: /j.athoracsur

2. Fig 1
Receiver operating characteristic curves for the (Top) aortic and (Bottom) mitral models. (ROC = receiver operating characteristic; CI = confidence interval.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

3. Fig 2
Observed versus expected deaths for deciles of increasing risk. (Top) Aortic. (Bottom) Mitral.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

4. Fig 3
Relative contribution of predictors to in-hospital mortality. (Top) Aortic. (Bottom) Mitral. (BSA = body surface area; CABG = coronary artery bypass graft; CAD = coronary artery disease; CHF = congestive heart failure; NYHA = New York Heart Association.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )