Table 4 Odds ratios for ACS for two hypothetical patients, A and B, used as examples. Patient A is female, 72 years old, and seeks emergency care with ongoing chest discomfort that has lasted for 7 hours. She has undergone CABG previously and has had angina pectoris in connection with physical effort the last month. The ECG shows an elevation of the ST-amplitude above 200 in lead V2 only. Patient B is male, 35-year old, and with chest discomfort for the last 72 hours but without any ST-elevations according to the ECG.
Model Estimate | Patient A | OR | Patient B | OR | |
|---|---|---|---|---|---|
Baseline odds for ACS | 0.0163 | 0.00163 | 0.00163 | ||
Odds ratios | |||||
Age (no. of years above 40) | 1.031 | 72 | 1.03132 | 35 | 1.031-5 |
Hypertension | 1.7 | No | 1.0 | No | 1.0 |
Angina pectoris ≤ 1 month | 4.1 | Yes | 4.1 | No | 1.0 |
Congestive heart failure | 0.48 | No | 1.0 | No | 1.0 |
Previous myocardial infarction | No | 1.0 | No | 1.0 | |
Yes, ≤ 6 months | 2.7 | ||||
Yes, > 6 months | 2.1 | ||||
No | 1.0 | ||||
Previous CABG | 0.23 | Yes | 0.23 | No | 1.0 |
Chest discomfort at presentation | 1.9 | Yes | 1.9 | Yes | 1.9 |
Symptom duration | 7 hours | 2.8 | 72 hours | 1.0 | |
0 – 6 h | 3.8 | ||||
7 – 12 h | 2.8 | ||||
> 12 h | 1.0 | - | |||
I-STamp | No | 1.0 | No | 1.0 | |
I-STamp > 50 and I-STamp38 > I-STamp | 2.4 | ||||
aVF-STamp | No | 1.0 | No | 1.0 | |
aVF-STamp>100 and aVF-STamp38>aVF-STamp | 9.4 | ||||
aVF-STamp < -100 and aVF-STamp38 < aVF-STamp | 4.1 | ||||
None of above | 1.0 | ||||
V2-STamp | > 200 | 3.4 | No | 1.0 | |
V2-STamp > 200 and V2-STamp38 > V2-Stamp | 3.4 | ||||
100 < V2-STamp ≤ 200 and V2-STamp38 > V2-STamp | 1.6 | ||||
V2-STamp < -100 and V2-STamp38 < V2-STamp | 2.6 | ||||
None of above | 1.0 | - |