Table 4.

Diagnostic performances of chest pain history in percent (95% CI) in patients with non-ischemic ECG* and normal initial troponin T

	Sensitivity	Specificity	LR+	LR-
Chest pain history
Typical of ACS	32 (25–39)	83 (81–86)	1.9 (1.4-2.5)	0.8 (0.7-0.9)
Typical of AMI±	11 (6–19)	93 (91–94)	1.6 (0.9-3.0)	1.0 (0.9-1.0)
Typical of UA≠	45 (32–59)	90 (89–92)	4.7 (3.3-6.7)	0.6 (0.5-0.8)
Nonspecific for ACS	6 (3–11)	64 (61–67)	0.2 (0.1-0.3)	1.5 (1.4-1.6)
Not suspicious of ACS	0.3 (0–3)	60 (57–63)	0.01 (0.00-0.13)	1.7 (1.6-1.8)

LR, likelihood ratio; ACS, Acute coronary syndrome; AMI, Acute myocardial infarction; UA, Unstable angina pectoris.

*Normal ECG defined as the absence of ST-elevation, ST-depression, T-wave inversion, q-waves and LBBB.

± Calculated with AMI as outcome measure.

≠ Calculated with UA as outcome measure.