Table 1. Quality control results of RC in the different datasets.

No.	Study	IQC	EQC	CQCg	CQCp	AQCg	AQCp	Rank
1	GSE75548	3.92	2	1.8*	2.23	1.9*	1.13*	1.83
2	GSE12225	4.74	2	0.68*	1.66*	1.08*	2.38	2.00
3	GSE35982	5.62	2	0.02*	10.03	0*	0.07*	2.67
4	GSE34472	1.3*	0.4*	0.24*	0.36*	0.56*	0.11*	3.50

RC, rectal cancer; GSE, GEO dataset; IQC, internal quality control indexes; EQC, external quality control indexes; CQCg and CQCp, consistency of differential expression quality control indexes for genes and pathways; AQCg and AQCp, accuracy quality control indexes for genes and pathways.

* P-value not significant after Bonferroni correction.