Table 2.

Validation of three different algorithms.

	AG1	AG2	AG3
Culprit artery
Sensitivity	0.69 (0.61–0.76)	0.68 (0.60–0.76)	0.62 (0.54–0.70)
Specificity	0.89 (0.85–0.92)	0.91 (0.87–0.94)	0.95 (0.92–0.97)
LR+	6.42 (4.67–8.84)	7.55 (5.33–10.70)	12.21 (7.65–19.49)
LR−	0.35 (0.27–0.44)	0.35 (0.27–0.44)	0.40 (0.32–0.49)
A-ROC	0.79 (0.75–0.83)	0.79 (0.75–0.84)	0.78 (0.74–0.83)
Catheterization
Sensitivity	0.66 (0.58–0.73)	0.65 (0.57–0.72)	0.57 (0.49–0.64)
Specificity	0.91 (0.87–0.93)	0.93 (0.89–0.95)	0.95 (0.93–0.97)
LR+	7.11 (5.00–10.13)	8.74 (5.90–12.95)	12.78 (7.66–21.33)
LR−	0.38 (0.35–0.47)	0.38 (0.35–0.47)	0.45 (0.38–0.54)
A-ROC	0.78 (0.74–0.82)	0.79 (0.75–0.83)	0.76 (0.72–0.80)
STEMI activation
Sensitivity	0.79 (0.72–0.85)	0.79 (0.71–0.85)	0.67 (0.59–0.74)
Specificity	0.95 (0.91–0.97)	0.97 (0.94–0.98)	0.98 (0.96–0.99)
LR+	14.60 (9.36–22.77)	22.92 (13.06–40.21)	33.35 (15.88–70.03)
LR−	0.22 (0.16–0.30)	0.22 (0.16–0.30)	0.34 (0.27–0.42)
A-ROC	0.87 (0.84–0.90)	0.88 (0.84–0.91)	0.82 (0.79–0.86)

Values in parenthesis are 95% CI.

LR = likelihood ratio.

A-ROC = area under the receiver operating characteristic curve.