|  | 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 | Â | 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 | Â | 146.0 | 100% | 247 | 100% |