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Table 1 Baseline characteristics of the study population by age category (n = 3475)

From: Predictors of non-invasive therapy and 28-day-case fatality in elderly compared to younger patients with acute myocardial infarction: an observational study from the MONICA/KORA Myocardial Infarction Registry

  Age category
Variable 25–64 years n = 1329 (38.2) 65–74 years n = 1083 (31.2) 75–84 years n = 1063 (30.6) p Value
Sociodemographics
 Age (years)a 55 (49–60) 70 (68–72) 79 (77–81) <0.0001
 Female sex 251 (18.9) 327 (30.2) 500 (47.0) <0.0001
 Marriedb 885 (69.6) 777 (75.6) 607 (61.9) <0.0001
 Living aloneb 255 (20.1) 189 (18.4) 278 (28.4) <0.0001
 Body mass index ≥30 kg/m2 413 (31.1) 255 (23.6) 183 (17.2) <0.0001
 Smoker     <0.0001
  Current smoker 714 (53.7) 201 (18.6) 74 (7.0)  
  Ex-smoker 337 (25.4) 403 (37.2) 308 (29.0)  
  Never-smoker 234 (17.6) 391 (36.1) 476 (44.8)  
  missing/not known 44 (3.3) 88 (8.1) 205 (19.3)  
Medical historyc
 Prior MI 181 (13.6) 228 (21.1) 244 (23.0) <0.0001
 Prior stroke 51 (3.8) 117 (10.8) 171 (16.1) <0.0001
 Diabetes 353 (26.6) 439 (40.5) 439 (41.3) <0.0001
 Hypertension 910 (68.5) 885 (81.7) 943 (88.7) <0.0001
 Hyperlipidemia 631 (47.5) 538 (49.7) 453 (42.6) 0.004
 Angina pectoris 135 (10.2) 187 (17.3) 210 (19.8) <0.0001
 Chronic obstructive pulmonary disease 50 (3.8) 92 (8.5) 92 (8.7) <0.0001
Clinical characteristics
 Type of AMI     <0.0001
  STEMI 625 (47.0) 369 (34.1) 298 (28.0)  
  NSTEM 651 (49.0) 603 (55.7) 599 (56.4)  
  Bundle branch block 53 (4.0) 111 (10.2) 166 (15.6)  
 Peak serum CPK level (U/l)a,b 744 (265–1915) 530 (212–1292) 395 (173–991) <0.0001
 LVEF     <0.0001
  > 30 % 1141 (85.8) 841 (77.7) 711 (67.0)  
  ≤ 30 % 73 (5.5) 87 (8.0) 123 (11.5)  
  not assessed/missing 115 (8.7) 155 (14.3) 229 (21.5)  
 Renal dysfunctiond 54 (4.1) 159 (14.7) 306 (28.8) <0.0001
 Pre-hospital time/symptom onset to arrival (min)a 159 (79–585) 175 (77–613) 188 (75–565) 0.95
  1. Data are presented as number (percentage) unless otherwise indicated. P values were calculated for comparison of the age categories
  2. AMI acute myocardial infarction, STEMI ST-elevation myocardial infarction, NSTEMI non-ST-elevation myocardial infarction, CPK creatine phosphokinase, LVEF left ventricular ejection fraction
  3. a Presented as median values (25th, 75th percentiles)
  4. b Values were calculated without patients with missing data regarding married (n = 195), living alone status (n = 195), and peak serum CPK level (n = 23)
  5. c Patient-reported medical history of known comorbidities before the acute event, which was collected with a standardized interview during hospital stay and further data were gathered in a concluding chart review. If the information on comorbidities from patient-report and medical chart differed, the chart information was used
  6. d Information on renal dysfunction was collected by review of medical chart