[Retracted] MKA: A Scalable Medical Knowledge-Assisted Mechanism for Generative Models on Medical Conversation Tasks

Table 4

Comparison of the models on MedDG, where the best results are in bold.

Model	Dialog-GPT	Transformer	BERT-GPT	MKA-Transformer	MKA-BERT-GPT
Perplexity	8.53	8.52	5.98	8.41	5.95
BLEU-2	6.41%	6.30%	7.62%	6.62%	8.09%
BLEU-4	2.12%	2.08%	2.57%	2.40%	2.87%
NIST-2	0.38	0.37	0.42	0.39	0.43
NIST-4	0.35	0.35	0.39	0.38	0.41
METEOR	13.78%	14.32%	16.25%	14.88%	16.63%
Entropy-4	10.56	10.17	13.38	10.28	13.37
Dist-1	0.01%	0.01%	0.02%	0.01%	0.02%
Dist-2	1.72%	1.67%	2.00%	1.69%	2.00%