Table 1.

Statistics of the six extracted association groups.

ASSOCIATION	RECORD	UNIQUE ASSOCIATION	UMLS UNIQUE ASSOCIATION
Disease to Disease	2,516,049	843,221	2,457,748
Disease to Gene	206,155	111,117	43,368
Disease to Drug	3,021,256	1,277,879	96,290
Drug to Gene	398,572	248,491	99,275
Drug to Drug	4,780,394	1,900,576	2,113,243
Gene to Gene	108,035	49,593	218,843