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Table 1 Baseline characteristics, prevalence of chest pain, incidence of AMI and other diagnoses among all GP- and 1–1-2 triaged patients

From: Chest pain in the ambulance; prevalence, causes and outcome - a retrospective cohort study

  All transports Chest pain p-value
No Yes
Acute ambulance transports, n(%) 61,088 (100.0%) 51,055 (83.6%) 10,033 (16.4%)  
 Registrations, N per 1000 inhabitants per year 47.5 39.7 7.8  
Way of ambulance request, n(%)
 GP 32,036 (52.4%) 25,743 (50.4%) 6293 (62.7%) < 0.001
 112 29,052 (47.6%) 25,312 (49.6%) 3740 (37.3%)  
Pre-hospital triage, n(%)
 A 28,230 (46.3%) 19,420 (38.1%) 8810 (87.8%) < 0.001
 B 24,754 (40.6%) 23,813 (46.7%) 941 (9.4%)  
 C 8046 (13.2%) 7766 (15.2%) 280 (2.8%)  
Male gender, n(%) 31,563 (51.7%) 26,005 (50.9%) 5558 (55.4%) < 0.001
Age, median (IQR) 65 (45, 78) 65 (42, 78) 66 (52, 77) < 0.001
Diabetes, n(%) 7080 (11.6%) 5754 (11.3%) 1326 (13.2%) < 0.001
Prior AMI, n(%) 4273 (7.0%) 2718 (5.3%) 1555 (15.5%) < 0.001
Charlson comorbidity index, n(%)
 0 14,736 (24.2%) 13,158 (25.8%) 1578 (15.7%) < 0.001
 1–2 12,285 (20.2%) 9586 (18.8%) 2699 (26.9%)  
 3–4 14,698 (24.1%) 11,994 (23.6%) 2704 (27.0%)  
  > =5 19,224 (31.5%) 16,173 (31.8%) 3051 (30.4%)  
 Length of stay, hours, median(IQR) 5.8 (2.0, 37.3) 4.8 (1.9, 36.0) 11.2 (3.6, 42.7) < 0.001
 Place of first admittance (Non-cardiac/CCU/Invasive centre)a 52,981/5267/2840 47,613/2357/1085 5368/2910/1755  
Final diagnosis
 Acute cardiac conditions, n(%): 2333 (3.8%) 1015 (2.0%) 1318 (13.1%) < 0.001
  Acute myocardial infarction: 1482 (2.4%) 428 (0.8%) 1054 (10.5%)  
  STEMI 453 (0.7%) 113 (0.2%) 340 (3.4%)  
  NSTEMI 1029 (1.7%) 315 (0.6%) 714 (7.1%)  
 Other acute cardiovascular conditions: 851 (1.4%) 587 (1.1%) 264 (2.6%)  
  UAP 181 (0.3%) 41 (0.1%) 140 (1.4%)  
  Cardiac arrest 204 (0.3%) 193 (0.4%) 11 (0.1%)  
  Ventricular tachycardia 53 (0.1%) 38 (0.1%) 15 (0.1%)  
  Aortic dissection 114 (0.2%) 93 (0.2%) 21 (0.2%)  
  Pulmonary Embolism 299 (0.5%) 222 (0.4%) 77 (0.8%)  
 Other cardiovascular and non-cardiovascular conditions, n(%): 44,125 (72.2%) 40,478 (79.3%) 3647 (36.4%) < 0.001
  Certain infectious and parasitic diseases 1928 (3.2%) 1822 (3.6%) 106 (1.1%)  
  Neoplasms 580 (0.9%) 559 (1.1%) 21 (0.2%)  
  Endocrine, nutritional and metabolic diseases 1373 (2.2%) 1306 (2.6%) 67 (0.7%)  
  Mental and behavioral disorders 1959 (3.2%) 1851 (3.6%) 108 (1.1%)  
  Diseases of the nervous system 2004 (3.3%) 1962 (3.8%) 42 (0.4%)  
  Diseases of the circulatory system (other than acute) 6332 (10.4%) 4598 (9.0%) 1734 (17.3%)  
  Diseases of the respiratory system 6453 (10.6%) 5854 (11.5%) 599 (6.0%)  
  Diseases of the digestive system 3405 (5.6%) 3097 (6.1%) 308 (3.1%)  
  Diseases of the musculoskeletal system and connective tissue 1239 (2.0%) 1126 (2.2%) 113 (1.1%)  
  Diseases of the genitourinary system 1853 (3.0%) 1760 (3.4%) 93 (0.9%)  
  Injury, poisoning and certain other consequences of external causes 12,739 (20.9%) 12,587 (24.7%) 152 (1.5%)  
  Other diagnosesb 4260 (7.0%) 3956 (7.7%) 304 (3.0%)  
 No final diagnosis, n(%): 14,630 (23.9%) 9562 (18.7%) 5068 (50.5%) < 0.001
  Symptoms, signs and abnormal clinical and laboratory findings 8571 (14.0%) 6177 (12.1%) 2394 (23.9%)  
  Medical observation and evaluation for suspected diseases and conditions or other reasons 6059 (9.9%) 3385 (6.6%) 2674 (26.7%)  
  1. GP General practitioner, IQR interquartile range, UAP Unstable angina pectoris, STEMI ST-segment elevation myocardial infarction, NSTEMI non ST-segment elevation myocardial infarction
  2. a Place of first admittance (Non-cardiac department, including ED / CCU /Invasive Centre)
  3. bChapters containing < 1% of the total number of transports