Variable | Measurement scale |
---|---|
A. High sensitivity cardiac troponin T (ng/L) | Continuous |
B. Heart-type fatty acid binding protein (ng/mL) | Continuous |
C. ECG ischaemia | Dichotomous |
D. Sweating observed by the treating clinician | Dichotomous |
E. Vomiting in association with the presenting symptoms | Dichotomous |
F. Systolic BP <100 mm Hg on arrival | Dichotomous |
G. Worsening (or crescendo) angina | Dichotomous |
H. Pain radiating to the right arm or shoulder | Dichotomous |
*The MACS model estimates the probability (p) of acute coronary syndromes as follows (rounded values are presented): p=1/(1+e−(0.068a+(0.17(b−0.28)/1.35)+1.75c+1.85d+1.72e+1.46f+0.92g+0.87h−4.83)).5 For dichotomous variables, a value of ‘1’ is entered for ‘yes’ and ‘0’ for ‘no’. The constants presented here assume use of the Roche Diagnostics Elecsys hs-cTnT assay and the Randox Laboratories immunoturbidimetric H-FABP assay.