title: Trends in the association between age and in-hospital mortality after percutaneous coronary intervention: National Cardiovascular Data Registry experience.
abstract: BACKGROUND
  Temporal trends and contemporary data characterizing the impact of patient age on in-hospital outcomes of percutaneous coronary interventions are lacking. We sought to determine the importance of age by assessing the in-hospital mortality of stratified age groups in the National Cardiovascular Data Registry.
  
  
  RESULTS
  In-hospital mortality after percutaneous coronary intervention on 1 410 069 patients was age stratified into 4 groups-group 1 (age <40, n=25 679), group 2 (40 to 59, n=496 204), group 3 (60 to 79, n=732 574), and group 4 (>or=80, n=155 612)-admitted from January 1, 2001, to December 31, 2006. Overall in-hospital mortality was 1.22%; in-hospital mortality was 0.60%, 0.59%, 1.26%, and 3.16% in groups 1 to 4, respectively, P<0.0001. Overall temporal improvement per calendar year in the adjusted in-hospital mortality after percutaneous coronary intervention was noted in most groups; however, this finding was significant only in the 2 older age groups, group 3 (odds ratio, 0.94; 95% CI, 0.92 to 0.96) and group 4 (odds ratio, 0.95; 95% CI, 0.92 to 0.97). The absolute mortality reduction was greatest in the most elderly group, those over the age of 80 years.
  
  
  CONCLUSIONS
  In-hospital mortality after percutaneous coronary intervention has fallen for all age groups over the past 6 years. However, the largest absolute reduction was seen among patients 80 years of age or older.
authors.affiliation: Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minn 55905, USA. singh.mandeep@mayo.edu
authors.forename: Mandeep
authors.initials: M
authors.lastname: Singh
authors.forename: Eric D
authors.initials: ED
authors.lastname: Peterson
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Roe
authors.forename: Fang-Shu
authors.initials: FS
authors.lastname: Ou
authors.forename: John A
authors.initials: JA
authors.lastname: Spertus
authors.forename: John S
authors.initials: JS
authors.lastname: Rumsfeld
authors.forename: H Vernon
authors.initials: HV
authors.lastname: Anderson
authors.forename: Lloyd W
authors.initials: LW
authors.lastname: Klein
authors.forename: Kalon K L
authors.initials: KK
authors.lastname: Ho
authors.forename: David R
authors.initials: DR
authors.lastname: Holmes
mesh_terms: D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000401:mortality*; D005260:Female; D019538:Health Care Surveys; D017052:Hospital Mortality / Q000639:trends; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012042:Registries; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D014481:United States