Table 5.

Performance comparison of AUC in 10-fold CV using different settings of negative sampling (GCN with only DDI data).

Values of p*	5%	10%	15%	20%	25%	50%
Values of r*	0.5:1	1:1	1.5:1	2:1	2.5:1	5:1
Average AUC	0.809 ± 0.05	0.857 ± 0.04	0.853 ± 0.04	0.837 ± 0.04	0.803 ± 0.04	0.753 ± 0.04

p, the percentage of selected negative sample number to the number of benchmark positive samples.

r, the ratio of the size of the negative dataset to that of the positive dataset in both training process and prediction performance process.