Table 3. Relationship between ZNF278, FAM155A and DPP6 methylation and clinicopathological parameters in surgically treated clear cell renal cell carcinoma.

Variables		ZNF278		FAM155A		DPP6
		Methylation, %	P value	Methylation, %	P value	Methylation, %	P value
T stage			0.001		0.002		< 0.001
	T1	18.30 ± 11.95		15.69 ± 10.10		19.41 ± 11.24
	T2	26.56 ± 15.53		24.40 ± 17.39		25.39 ± 14.96
	T3–4	28.19 ± 15.27		24.20 ± 19.15		32.61 ± 17.57
Fuhrman grade			0.022		0.039		0.001
	1–2	18.85 ± 12.09		16.15 ± 10.89		19.21 ± 10.35
	3–4	24.63 ± 15.32		21.61 ± 16.67		28.35 ± 17.42
Metastasis			0.002		< 0.001		< 0.001
	No	19.38 ± 13.21		16.29 ± 12.13		20.44 ± 12.98
	Yes	28.86 ± 12.36		27.72 ± 15.66		32.74 ± 13.61

P value calculated using Student's t-test.

ZFP28 = Zinc finger protein 28, FAM155A = family with sequence similarity 155, member A, DPP6 = dipeptidyl peptidase 6.