Table 4.

Contribution of each knowledge source to the four classes and the final heart-failure vocabulary.

Sources	Classes
	Causes or risk factors(N=435)	Signs or symptoms (N = 233)	Diagnostic tests or results (N = 590)	Treatment (N=477)	Final vocabulary (N =1648)
Harrison's	71(16%)	79 (34%)	75 (13%)	77 (26%)	298 (18%)
UpToDate	110(25%)	45(19%)	120(20%)	116(24%)	380 (23%)
ACC key data element	126 (30%)	47 (20%)	115(19%)	100(23%)	386 (23%)
ESC guideline	81(17%)	54 (23%)	205 (35%)	154(32%)	484 (29%)
DynaMed	162 (37%)	55 (24%)	118(20%)	148(31%)	474 (29%)
ACC guideline	194(45%)	63 (27%)	146(25%)	178(37%)	565 (34%)
Braunwald	150 (34%)	147(63%)	298(51%)	239 (50%)	810(49%)