Table 2. Level of cardiac markers according to emergency room visit time and final diagnosis.

Variables		Reference, ng/mL	All patients (n = 89)	ER visit time, hr			Final diagnosis
				0–4 (n = 49)	4–24 (n = 40)	P value	Non-CAD (n = 19)	STEMI (n = 37)	NSTEMI (n = 28)	Unstable angina (n = 5)	P value
1st venous sampling
	H-FABP	0–5.0	2.90 (< 0.10–17.20)	1.80 (0.00–7.20)	6.52 (0.30–28.73)	0.075	0.40 (< 0.10–2.10)	5.80 (1.10–26.30)	8.10 (0.65–26.48)	< 0.10 (< 0.10–< 0.10)	0.001
	Cardiac TnI	0–0.045	0.07 (< 0.04–0.88)	0.00 (0.00–0.21)	0.25 (0.00–2.75)	0.007	< 0.04 (< 0.04–0.05)	0.09 (< 0.04–0.45)	0.73 (0.06–4.27)	< 0.04 (< 0.04–< 0.04)	< 0.001
	CK-MB	0–2.8	2.00 (1.00–8.40)	1.90 (0.00–3.40)	3.95 (1.15–12.35)	0.058	1.30 (< 1.00–2.95)	2.00 (1.19–8.60)	6.15 (1.80–14.15)	< 1.00 (< 1.00–2.00)	0.016
2nd venous sampling
	H-FABP	0–5.0	9.50 (0.20–28.20)	16.10 (1.20–31.70)	5.00 (0.03–23.60)	0.113	< 0.10 (< 0.10–2.08)	23.90 (12.20–55.00)	12.00 (0.70–26.10)	< 0.10 (< 0.10–< 0.10)	< 0.001
	Cardiac TnI	0–0.045	3.53 (0.07–31.60)	2.66 (0.12–40.00)	5.10 (0.06–27.55)	0.476	< 0.04 (< 0.04–0.12)	40.00 (12.40–105.00)	2.27 (0.73–6.33)	< 0.04 (< 0.04–< 0.04)	< 0.001
	CK-MB	0–2.8	19.10 (1.81–86.40)	19.40 (2.10–101.80)	14.40 (1.10–81.62)	0.242	0.80 (< 1.00–2.33)	101.80 (54.50–270.50)	8.90 (3.15–22.15)	< 1.00 (< 1.00–1.30)	< 0.001

Values are presented as median (interquartile range).

H-FABP = heart-type fatty acid-binding protein, TnI = troponin I, CK-MB = creatine kinase-myocardial band.