After a patient has survived an acute myocardial infarction, the long-term survival can be predicted from clinical parameters.
|
Parameter
|
Present
|
Absent
|
|
history of a previous myocardial infarction
|
-0.846
|
0
|
|
history of hypertension
|
-0.998
|
0
|
|
highest pulse rate >=100 beats/minute (tachycardia)
|
-0.903
|
0
|
|
cardiac arrest
|
-1.215
|
0
|
|
ventricular arrhythmia
|
-0.630
|
0
|
|
atrial fibrillation
|
-1.353
|
0
|
score =
= SUM (points for each parameter)
Interpretation
LN ((probability of survival) / (1 - (probability of survival)) =
= LN ((probability of survival)/ (probability of death)) =
= 1.842 - (score)
probability of surviving 5 years after a myocardial infarction =
= EXP(1.842 - (score)) / (1 + (EXP(1.842 - (score))))
