Table 4.

Comparison of derivation and validation patient characteristics

Terms	Derivation (n = 44)	Validation (n = 22)	P
Gender (male)	26 (65.0)	14 (69.2)	0.722
Fever (> 38.5 ℃)	17 (39.5)	9 (40.9)	0.915
Congestive heart failure	2 (4.6)	2 (9.1)	0.407
Left-ventricular ejection fraction (< 50%)	13 (29.5)	8 (36.4)	0.575
Pulmonary edema	7 (15.9)	4 (18.2)	0.535
Ventricular tachycardia	9 (20.5)	3 (13.6)	0.377
Lactic acid value (> 4 mmol/L)	25 (56.8)	14 (63.6)	0.595
Fulminant myocarditis	28 (63.6)	10 (45.5)	0.159
Abnormal CK-MB	33 (75.0)	17 (77.3)	0.839
Hypotension	11 (25.0)	7 (31.8)	0.558

Values are presented as n (%). CK-MB creatine kinase-MB