Alghamdi et al evaluated patients with chest pain using the history and electrocardiogram only Manchester acute coronary syndromes decision aid. The authors are from the University of Manchester, Manchester Metropolitan University, St. George's University Hospitals and King Saud Bin Abdulaziz University for Health Sciences.
Patient selection: chest pain
Parameters:
(1) sweating observed
(2) acute ECG ischemia (new onset of ST segment deviation and/or abnormal T inversion)
(3) pain radiating to the right arm or shoulder
(4) vomiting associated with pain
(5) systolic blood pressure
(6) current tobacco smoker
(7) age in years
(8) sex
Parameter
Finding
Beta Coefficient
sweating observed
no
0
yes
1.426
acute ECG ischemia
no
0
yes
1.838
pain radiating
no
0
yes
0.734
vomiting with pain
no
0
yes
0.996
systolic blood pressure
>= 100 mm Hg
0
< 100 mm Hg
1.353
current tobacco smoker
no
0
yes
0.675
age in years
0.024 * (age)
sex
male
0.462
female
0
X =
= SUM(beta coefficients for all 8 parameters) - 4.416
probability of an acute coronary syndrome =
= 1 / (1 + EXP((-1) * X))
Performance:
• The area under the ROC curve is 0.82.
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