. Author manuscript; available in PMC: 2018 Aug 1.

Published in final edited form as: J Biomed Inform. 2018 May 12;82:189–199. doi: 10.1016/j.jbi.2018.05.003

Table 5.

Imbalanced training data: test set scores with length ≤ 3 primitive patterns for causative relations

Imbalance in training set	Min. Frequency: 1000			Min. Frequency: 500			Min. Frequency: 100

	Prec.	Rec.	F-score	Prec.	Rec.	F-score	Prec.	Rec.	F-score
\|N\| = 2 · \|P\|	0.531	0.685	0.597	0.626	0.710	0.665	0.667	0.728	0.696
\|N\| = 4 · \|P\|	0.619	0.667	0.642	0.721	0.684	0.702	0.761	0.689	0.723
\|N\| = 10 · \|P\|	0.762	0.597	0.669	0.799	0.623	0.700	0.817	0.621	0.705