title: Invited commentary.
authors.affiliation: University of Alberta Hospital, 2D4.37 Walter MacKenzie Health Sciences Centre, 8440 112th St, Edmonton, ABT6G 2B7, Canada. dbross@cha.ab.ca
authors.forename: David B
authors.initials: DB
authors.lastname: Ross
mesh_terms: D000369:Aged, 80 and over; D006348:Cardiac Surgical Procedures / Q000379:methods* / Q000401:mortality*; D015331:Cohort Studies; D005260:Female; D015577:Geriatric Assessment; D017052:Hospital Mortality / Q000639:trends*; D006801:Humans; D007558:Italy; D008297:Male; D012189:Retrospective Studies; D018570:Risk Assessment; D016019:Survival Analysis