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Table 1 Clinical characteristics. Clinical characteristics of St George emergency department patients with triage code 1 or 2 and provisional ED diagnosis of chest pain or cardiovascular disease.

From: An outbreak of cardiovascular syndromes requiring urgent medical treatment and its association with environmental factors: an ecological study

   Comparison period (April & May 2002–2004) Outbreak period (April & May 2005)
   Average count per year % Count %
Age in years (median; IQR) 71; 56–81   70; 55–82  
Age group 0–34 years 7.0 5% 9 4%
  35–64 years 51.3 35% 87 35%
  65 years and over 87.7 60% 151 61%
Male   92.0 63 % 134 54%
Disposition from ED Discharged from ED 26.3 18% 20 8%
  Admitted to ward 55.3 38% 89 36%
  Admitted to critical care 51.7 35% 128 52%
  Died in ED 11.3 8% 7 3%
  Transferred to other facility 1.3 1% 3 1%
Hospital length of stay in days (median; IQR) 4; 2–8   4; 1–8  
Major procedures in hospital Coronary angiography +/- stent insertion 27.0 25% 48 22%
  Coronary artery bypass grafting 6.7 6% 10 5%
  Cardioversion 1.0 1% 3 1%
  Insertion of pacemaker 2.0 2% 4 2%
Final disposition from hospital Home 92.3 86% 179 82%
  Transferred to other facility 8.3 8% 26 12%
  Died 6.3 6% 12 6%
Final discharge diagnosis Acute myocardial infarction 29.3 27% 51 24%
  Angina 14.3 13% 29 13%
  Non cardiac chest pain 11.7 11% 40 18%
  Arrhythmia 14.7 14% 26 12%
  Cardiac failure 10.3 10% 15 7%
  Other 26.7 25% 56 26%
Total   146.0 100% 247 100%
  1. Length of stay, procedures and final disposition and diagnosis only available for patients admitted to an inpatient ward