Table I.

Fifteen gene expression omnibus series datasets of HCC.

	HCC		Non-cancerous
ID	n	Mean ± SD	n	Mean ± SD	P-value
GSE57555	5	0.013±0.032	16	0.275±0.540	0.300
GSE69580	5	4.337±1.241	5	4.677±0.483	0.951
GSE54751	10	0.412±0.323	10	1.314±0.848	0.006
GSE41874	6	0.855±0.224	4	1.209±0.800	0.323
GSE50013	20	8.342±1.452	20	6.460±2.979	0.017
GSE40744	39	5.518±1.600	18	5.318±0.891	0.549
GSE20971	49	7.424±1.716	9	8.383±0.866	0.108
GSE21362	73	8.324±1.013	73	9.396±0.553	<0.001
GSE12717	10	9.370±1.118	6	11.279±0.432	0.001
GSE6857	241	11.417±1.396	241	11.802±1.054	0.006
GSE67882	4	0.783±1.976	8	−0.621±0.724	0.094
GSE65708	6	14.711±1.372	8	16.335±1.210	0.037
GSE74618	218	2.434±1.074	20	3.254±1.211	0.001
GSE39678	16	10.300±0.697	8	11.393±0.440	0.001
GSE21279	4	4.624±1.001	11	4.809±1.862	0.855

SD, standard deviation.