|
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. |
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| 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 |
- |
|||
Björk et al. BMC Medical Informatics and Decision Making 2006 6:28 doi:10.1186/1472-6947-6-28 |
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