Table 2. Expression levels of genes in different histologic grade groups.

Gene	TCGA dataset			GSE15459 dataset
	Grade 1–2*	Grade 3*	p-Value	Grade 1–2*	Grade 3*	p-Value
PDGFRB	23.49514	30.17688	0.002416	8.250134	8.554542	0.020089
COL8A1	6.070836	10.00019	8.11E−05	5.544219	5.87443	0.023504
EFEMP2	5.779241	7.942439	0.000186	8.452001	8.811539	0.009623
FBN1	7.833488	11.33083	0.000521	7.800408	8.313964	0.008226
MRC2	11.80371	14.8516	0.009811	8.447961	8.693392	0.002748
EMILIN1	25.01557	37.77161	6.65E−05	8.017554	8.350455	0.042902
FSTL1	26.17743	36.42849	8.79E−05	8.317364	8.708802	0.003181
KIRREL	5.763699	7.420478	0.001808	5.705279	5.893113	0.007445

Notes.

^*Mean expression level.