authors Lee, Katherine C Streid, Jocelyn Sturgeon, Dan Lipsitz, Stuart Weissman, Joel S Rosenthal, Ronnie A Dae Hyun Kim, MD, MPH, ScD Mitchell, Susan L Zara Cooper, MD, MSc
has subject area Aged Aged, 80 and over Female Frailty Hospital Mortality Hospitalization Humans Male Medicare Outcome Assessment, Health Care Proportional Hazards Models Retrospective Studies Risk Assessment Severity of Illness Index Surgical Procedures, Operative Survival Analysis United States