TIMI Risk Score for STEMI

TIMI Risk Score for ST-Elevation Myocardial Infarction was introduced by Morrow et al in 2000.
But somehow it has not become as popular as the TIMI risk score for unstable angina. Eight parameters are included with a maximum possible risk score of 14 points and minimum possible score of zero.
Age between 65-74 years is given a score of 2 points, while age of 75 or above gets a score of 3 points. Systolic pressure below 100 gets 3 points while heart rate above 100 has 2 points and so has Killip class II-IV.
Anterior STEMI or LBBB (left bundle branch block) has 1 point. Presence of diabetes, history of hypertension or angina together gets 1 point. Weight below 67 and time to treatment more than 4 hours gets 1 point each.
The predicted 30 day mortality is 0.8 % with zero risk score while it is 35.9 with TIMI score more than 8. This means over a 40 fold increase in risk of mortality from the lower end of the score to the upper end.