title: Twenty-year trends in incidence and 1-year mortality in Swedish patients hospitalised with non-AMI chest pain. Data from 1987-2006 from the Swedish hospital and death registries.
abstract: OBJECTIVE
  To study trends for 20 years in incidence and 1-year mortality in hospitalised patients who received a diagnosis of either angina or unexplained chest pain (UCP) in Sweden.
  
  
  METHODS
  Register study of all patients aged 25-84 years identified from the Swedish National Hospital Discharge Register who were hospitalised with a first-time diagnosis of UCP or angina pectoris during 1987 to 2006.
  
  
  METHODS
  A total of 378 454 patients, 235 855 with UCP and 142 599 with angina.
  
  
  METHODS
  1-Year mortality and standardised mortality ratios (SMRs).
  
  
  RESULTS
  From the period 1987-1991 to 2002-2006, the observed 1-year mortality rate in men and women with UCP aged 25-74 years decreased from 2.19% to 1.45% and from 1.85% to 0.91%, respectively. SMRs decreased from 1.67 (95% CI 1.39 to 1.95) and 1.63 (1.27 to 2.00) to 1.09 (0.96 to 1.23) and 0.88 (0.75 to 1.00). Corresponding decreases in 1-year mortality for a discharge diagnosis of angina were from 6.50% to 2.49% in men and from 4.80% to 1.68% in women, with SMRs decreasing from 2.69 (2.33-3.05) and 2.59 (2.06-3.12) to 1.09 (0.93-1.25) and 1.05 (0.81-1.29), respectively. Similar changes occurred in patients aged 75-84 years. Only men with UCP aged 75-84 years still retained a slightly increased mortality (SMR 1.14 (1.01-1.28)).
  
  
  CONCLUSIONS
  The prognosis of patients admitted with chest pain in which acute myocardial infarction has been ruled out has improved for the past 20 years, such that the 1-year mortality of these patients is now similar to that in the general population.
authors.affiliation: Institute of Health and Care Sciences, Sahlgrenska Academy, Gothenburg, Sweden.
authors.forename: A J
authors.initials: AJ
authors.lastname: Fagring
authors.forename: G
authors.initials: G
authors.lastname: Lappas
authors.forename: K I
authors.initials: KI
authors.lastname: Kjellgren
authors.forename: C
authors.initials: C
authors.lastname: Welin
authors.forename: K
authors.initials: K
authors.lastname: Manhem
authors.forename: A
authors.initials: A
authors.lastname: Rosengren
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002637:Chest Pain / Q000175:diagnosis / Q000401:mortality*; D004812:Epidemiologic Methods; D005260:Female; D006760:Hospitalization / Q000639:trends*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012042:Registries / Q000706:statistics & numerical data; D013548:Sweden / Q000453:epidemiology; D055815:Young Adult